Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 3889:ae1b1788f63f
Merge
author | ysr |
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date | Wed, 31 Aug 2011 23:55:58 -0700 |
parents | fdb992d83a87 |
children | f08d439fab8c |
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 | |
0 | 48 |
49 | |
50 // Implementation of InterpreterMacroAssembler | |
51 | |
304 | 52 #ifdef CC_INTERP |
53 void InterpreterMacroAssembler::get_method(Register reg) { | |
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54 movptr(reg, Address(rbp, -((int)sizeof(BytecodeInterpreter) + 2 * wordSize))); |
304 | 55 movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method))); |
56 } | |
57 #endif // CC_INTERP | |
58 | |
59 #ifndef CC_INTERP | |
60 | |
0 | 61 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point, |
62 int number_of_arguments) { | |
63 // interpreter specific | |
64 // | |
65 // Note: No need to save/restore bcp & locals (r13 & r14) pointer | |
66 // since these are callee saved registers and no blocking/ | |
67 // GC can happen in leaf calls. | |
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68 // Further Note: DO NOT save/restore bcp/locals. If a caller has |
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69 // already saved them so that it can use esi/edi as temporaries |
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70 // then a save/restore here will DESTROY the copy the caller |
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71 // saved! There used to be a save_bcp() that only happened in |
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72 // the ASSERT path (no restore_bcp). Which caused bizarre failures |
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73 // when jvm built with ASSERTs. |
0 | 74 #ifdef ASSERT |
75 { | |
76 Label L; | |
304 | 77 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 78 jcc(Assembler::equal, L); |
79 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
80 " last_sp != NULL"); | |
81 bind(L); | |
82 } | |
83 #endif | |
84 // super call | |
85 MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments); | |
86 // interpreter specific | |
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87 // Used to ASSERT that r13/r14 were equal to frame's bcp/locals |
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88 // but since they may not have been saved (and we don't want to |
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89 // save thme here (see note above) the assert is invalid. |
0 | 90 } |
91 | |
92 void InterpreterMacroAssembler::call_VM_base(Register oop_result, | |
93 Register java_thread, | |
94 Register last_java_sp, | |
95 address entry_point, | |
96 int number_of_arguments, | |
97 bool check_exceptions) { | |
98 // interpreter specific | |
99 // | |
100 // Note: Could avoid restoring locals ptr (callee saved) - however doesn't | |
101 // really make a difference for these runtime calls, since they are | |
102 // slow anyway. Btw., bcp must be saved/restored since it may change | |
103 // due to GC. | |
104 // assert(java_thread == noreg , "not expecting a precomputed java thread"); | |
105 save_bcp(); | |
106 #ifdef ASSERT | |
107 { | |
108 Label L; | |
304 | 109 cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); |
0 | 110 jcc(Assembler::equal, L); |
111 stop("InterpreterMacroAssembler::call_VM_leaf_base:" | |
112 " last_sp != NULL"); | |
113 bind(L); | |
114 } | |
115 #endif /* ASSERT */ | |
116 // super call | |
117 MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp, | |
118 entry_point, number_of_arguments, | |
119 check_exceptions); | |
120 // interpreter specific | |
121 restore_bcp(); | |
122 restore_locals(); | |
123 } | |
124 | |
125 | |
126 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) { | |
127 if (JvmtiExport::can_pop_frame()) { | |
128 Label L; | |
129 // Initiate popframe handling only if it is not already being | |
130 // processed. If the flag has the popframe_processing bit set, it | |
131 // means that this code is called *during* popframe handling - we | |
132 // don't want to reenter. | |
133 // This method is only called just after the call into the vm in | |
134 // call_VM_base, so the arg registers are available. | |
135 movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset())); | |
136 testl(c_rarg0, JavaThread::popframe_pending_bit); | |
137 jcc(Assembler::zero, L); | |
138 testl(c_rarg0, JavaThread::popframe_processing_bit); | |
139 jcc(Assembler::notZero, L); | |
140 // Call Interpreter::remove_activation_preserving_args_entry() to get the | |
141 // address of the same-named entrypoint in the generated interpreter code. | |
142 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry)); | |
143 jmp(rax); | |
144 bind(L); | |
145 } | |
146 } | |
147 | |
148 | |
149 void InterpreterMacroAssembler::load_earlyret_value(TosState state) { | |
304 | 150 movptr(rcx, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 151 const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset()); |
152 const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset()); | |
153 const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset()); | |
154 switch (state) { | |
304 | 155 case atos: movptr(rax, oop_addr); |
156 movptr(oop_addr, (int32_t)NULL_WORD); | |
0 | 157 verify_oop(rax, state); break; |
304 | 158 case ltos: movptr(rax, val_addr); break; |
0 | 159 case btos: // fall through |
160 case ctos: // fall through | |
161 case stos: // fall through | |
162 case itos: movl(rax, val_addr); break; | |
163 case ftos: movflt(xmm0, val_addr); break; | |
164 case dtos: movdbl(xmm0, val_addr); break; | |
165 case vtos: /* nothing to do */ break; | |
166 default : ShouldNotReachHere(); | |
167 } | |
168 // Clean up tos value in the thread object | |
169 movl(tos_addr, (int) ilgl); | |
304 | 170 movl(val_addr, (int32_t) NULL_WORD); |
0 | 171 } |
172 | |
173 | |
174 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) { | |
175 if (JvmtiExport::can_force_early_return()) { | |
176 Label L; | |
304 | 177 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
178 testptr(c_rarg0, c_rarg0); | |
0 | 179 jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit; |
180 | |
181 // Initiate earlyret handling only if it is not already being processed. | |
182 // If the flag has the earlyret_processing bit set, it means that this code | |
183 // is called *during* earlyret handling - we don't want to reenter. | |
184 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset())); | |
185 cmpl(c_rarg0, JvmtiThreadState::earlyret_pending); | |
186 jcc(Assembler::notEqual, L); | |
187 | |
188 // Call Interpreter::remove_activation_early_entry() to get the address of the | |
189 // same-named entrypoint in the generated interpreter code. | |
304 | 190 movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset())); |
0 | 191 movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset())); |
192 call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0); | |
193 jmp(rax); | |
194 bind(L); | |
195 } | |
196 } | |
197 | |
198 | |
199 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp( | |
200 Register reg, | |
201 int bcp_offset) { | |
202 assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode"); | |
203 movl(reg, Address(r13, bcp_offset)); | |
204 bswapl(reg); | |
205 shrl(reg, 16); | |
206 } | |
207 | |
208 | |
1108 | 209 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index, |
210 int bcp_offset, | |
1565 | 211 size_t index_size) { |
1108 | 212 assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
1565 | 213 if (index_size == sizeof(u2)) { |
1108 | 214 load_unsigned_short(index, Address(r13, bcp_offset)); |
1565 | 215 } else if (index_size == sizeof(u4)) { |
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216 assert(EnableInvokeDynamic, "giant index used only for JSR 292"); |
1108 | 217 movl(index, Address(r13, bcp_offset)); |
218 // Check if the secondary index definition is still ~x, otherwise | |
219 // we have to change the following assembler code to calculate the | |
220 // plain index. | |
221 assert(constantPoolCacheOopDesc::decode_secondary_index(~123) == 123, "else change next line"); | |
222 notl(index); // convert to plain index | |
1565 | 223 } else if (index_size == sizeof(u1)) { |
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224 assert(EnableInvokeDynamic, "tiny index used only for JSR 292"); |
1565 | 225 load_unsigned_byte(index, Address(r13, bcp_offset)); |
226 } else { | |
227 ShouldNotReachHere(); | |
1108 | 228 } |
229 } | |
230 | |
231 | |
0 | 232 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, |
233 Register index, | |
1108 | 234 int bcp_offset, |
1565 | 235 size_t index_size) { |
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236 assert_different_registers(cache, index); |
1565 | 237 get_cache_index_at_bcp(index, bcp_offset, index_size); |
304 | 238 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 239 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
240 // convert from field index to ConstantPoolCacheEntry index | |
241 shll(index, 2); | |
242 } | |
243 | |
244 | |
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245 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache, |
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246 Register index, |
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247 Register bytecode, |
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248 int byte_no, |
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249 int bcp_offset, |
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250 size_t index_size) { |
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251 get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size); |
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252 // We use a 32-bit load here since the layout of 64-bit words on |
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253 // little-endian machines allow us that. |
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254 movl(bytecode, Address(cache, index, Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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255 const int shift_count = (1 + byte_no) * BitsPerByte; |
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256 shrl(bytecode, shift_count); |
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257 andl(bytecode, 0xFF); |
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258 } |
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259 |
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260 |
0 | 261 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, |
262 Register tmp, | |
1108 | 263 int bcp_offset, |
1565 | 264 size_t index_size) { |
0 | 265 assert(cache != tmp, "must use different register"); |
1565 | 266 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 267 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
268 // convert from field index to ConstantPoolCacheEntry index | |
269 // and from word offset to byte offset | |
270 shll(tmp, 2 + LogBytesPerWord); | |
304 | 271 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 272 // skip past the header |
304 | 273 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset())); |
274 addptr(cache, tmp); // construct pointer to cache entry | |
0 | 275 } |
276 | |
277 | |
278 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
279 // subtype of super_klass. | |
280 // | |
281 // Args: | |
282 // rax: superklass | |
283 // Rsub_klass: subklass | |
284 // | |
285 // Kills: | |
286 // rcx, rdi | |
287 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
288 Label& ok_is_subtype) { | |
289 assert(Rsub_klass != rax, "rax holds superklass"); | |
290 assert(Rsub_klass != r14, "r14 holds locals"); | |
291 assert(Rsub_klass != r13, "r13 holds bcp"); | |
292 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
293 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
294 | |
295 // Profile the not-null value's klass. | |
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296 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 297 |
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298 // Do the check. |
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299 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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300 |
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301 // Profile the failure of the check. |
0 | 302 profile_typecheck_failed(rcx); // blows rcx |
303 } | |
304 | |
305 | |
304 | 306 |
0 | 307 // Java Expression Stack |
308 | |
309 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 310 pop(r); |
0 | 311 } |
312 | |
313 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 314 // XXX can't use pop currently, upper half non clean |
0 | 315 movl(r, Address(rsp, 0)); |
304 | 316 addptr(rsp, wordSize); |
0 | 317 } |
318 | |
319 void InterpreterMacroAssembler::pop_l(Register r) { | |
320 movq(r, Address(rsp, 0)); | |
1506 | 321 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 322 } |
323 | |
324 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
325 movflt(r, Address(rsp, 0)); | |
304 | 326 addptr(rsp, wordSize); |
0 | 327 } |
328 | |
329 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
330 movdbl(r, Address(rsp, 0)); | |
1506 | 331 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 332 } |
333 | |
334 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 335 push(r); |
0 | 336 } |
337 | |
338 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 339 push(r); |
0 | 340 } |
341 | |
342 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 343 subptr(rsp, 2 * wordSize); |
0 | 344 movq(Address(rsp, 0), r); |
345 } | |
346 | |
347 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 348 subptr(rsp, wordSize); |
0 | 349 movflt(Address(rsp, 0), r); |
350 } | |
351 | |
352 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 353 subptr(rsp, 2 * wordSize); |
0 | 354 movdbl(Address(rsp, 0), r); |
355 } | |
356 | |
357 void InterpreterMacroAssembler::pop(TosState state) { | |
358 switch (state) { | |
359 case atos: pop_ptr(); break; | |
360 case btos: | |
361 case ctos: | |
362 case stos: | |
363 case itos: pop_i(); break; | |
364 case ltos: pop_l(); break; | |
365 case ftos: pop_f(); break; | |
366 case dtos: pop_d(); break; | |
367 case vtos: /* nothing to do */ break; | |
368 default: ShouldNotReachHere(); | |
369 } | |
370 verify_oop(rax, state); | |
371 } | |
372 | |
373 void InterpreterMacroAssembler::push(TosState state) { | |
374 verify_oop(rax, state); | |
375 switch (state) { | |
376 case atos: push_ptr(); break; | |
377 case btos: | |
378 case ctos: | |
379 case stos: | |
380 case itos: push_i(); break; | |
381 case ltos: push_l(); break; | |
382 case ftos: push_f(); break; | |
383 case dtos: push_d(); break; | |
384 case vtos: /* nothing to do */ break; | |
385 default : ShouldNotReachHere(); | |
386 } | |
387 } | |
388 | |
389 | |
1506 | 390 // Helpers for swap and dup |
391 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 392 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 393 } |
394 | |
1506 | 395 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
396 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 397 } |
398 | |
399 | |
710 | 400 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 401 // set sender sp |
304 | 402 lea(r13, Address(rsp, wordSize)); |
0 | 403 // record last_sp |
304 | 404 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
710 | 405 } |
406 | |
407 | |
408 // Jump to from_interpreted entry of a call unless single stepping is possible | |
409 // in this thread in which case we must call the i2i entry | |
410 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
411 prepare_to_jump_from_interpreted(); | |
0 | 412 |
413 if (JvmtiExport::can_post_interpreter_events()) { | |
414 Label run_compiled_code; | |
415 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
416 // compiled code in threads for which the event is enabled. Check here for | |
417 // interp_only_mode if these events CAN be enabled. | |
418 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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419 // Is a cmpl faster? |
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420 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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421 jccb(Assembler::zero, run_compiled_code); |
0 | 422 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); |
423 bind(run_compiled_code); | |
424 } | |
425 | |
426 jmp(Address(method, methodOopDesc::from_interpreted_offset())); | |
427 | |
428 } | |
429 | |
430 | |
431 // The following two routines provide a hook so that an implementation | |
432 // can schedule the dispatch in two parts. amd64 does not do this. | |
433 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
434 // Nothing amd64 specific to be done here | |
435 } | |
436 | |
437 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
438 dispatch_next(state, step); | |
439 } | |
440 | |
441 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
442 address* table, | |
443 bool verifyoop) { | |
444 verify_FPU(1, state); | |
445 if (VerifyActivationFrameSize) { | |
446 Label L; | |
304 | 447 mov(rcx, rbp); |
448 subptr(rcx, rsp); | |
449 int32_t min_frame_size = | |
0 | 450 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
451 wordSize; | |
304 | 452 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 453 jcc(Assembler::greaterEqual, L); |
454 stop("broken stack frame"); | |
455 bind(L); | |
456 } | |
457 if (verifyoop) { | |
458 verify_oop(rax, state); | |
459 } | |
460 lea(rscratch1, ExternalAddress((address)table)); | |
461 jmp(Address(rscratch1, rbx, Address::times_8)); | |
462 } | |
463 | |
464 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
465 dispatch_base(state, Interpreter::dispatch_table(state)); | |
466 } | |
467 | |
468 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
469 dispatch_base(state, Interpreter::normal_table(state)); | |
470 } | |
471 | |
472 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
473 dispatch_base(state, Interpreter::normal_table(state), false); | |
474 } | |
475 | |
476 | |
477 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
478 // load next bytecode (load before advancing r13 to prevent AGI) | |
479 load_unsigned_byte(rbx, Address(r13, step)); | |
480 // advance r13 | |
304 | 481 increment(r13, step); |
0 | 482 dispatch_base(state, Interpreter::dispatch_table(state)); |
483 } | |
484 | |
485 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
486 // load current bytecode | |
487 load_unsigned_byte(rbx, Address(r13, 0)); | |
488 dispatch_base(state, table); | |
489 } | |
490 | |
491 // remove activation | |
492 // | |
493 // Unlock the receiver if this is a synchronized method. | |
494 // Unlock any Java monitors from syncronized blocks. | |
495 // Remove the activation from the stack. | |
496 // | |
497 // If there are locked Java monitors | |
498 // If throw_monitor_exception | |
499 // throws IllegalMonitorStateException | |
500 // Else if install_monitor_exception | |
501 // installs IllegalMonitorStateException | |
502 // Else | |
503 // no error processing | |
504 void InterpreterMacroAssembler::remove_activation( | |
505 TosState state, | |
506 Register ret_addr, | |
507 bool throw_monitor_exception, | |
508 bool install_monitor_exception, | |
509 bool notify_jvmdi) { | |
510 // Note: Registers rdx xmm0 may be in use for the | |
511 // result check if synchronized method | |
512 Label unlocked, unlock, no_unlock; | |
513 | |
514 // get the value of _do_not_unlock_if_synchronized into rdx | |
515 const Address do_not_unlock_if_synchronized(r15_thread, | |
516 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
517 movbool(rdx, do_not_unlock_if_synchronized); | |
518 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
519 | |
520 // get method access flags | |
304 | 521 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
0 | 522 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); |
523 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
524 jcc(Assembler::zero, unlocked); | |
525 | |
526 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
527 // is set. | |
528 testbool(rdx); | |
529 jcc(Assembler::notZero, no_unlock); | |
530 | |
531 // unlock monitor | |
532 push(state); // save result | |
533 | |
534 // BasicObjectLock will be first in list, since this is a | |
535 // synchronized method. However, need to check that the object has | |
536 // not been unlocked by an explicit monitorexit bytecode. | |
537 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
538 wordSize - (int) sizeof(BasicObjectLock)); | |
539 // We use c_rarg1 so that if we go slow path it will be the correct | |
540 // register for unlock_object to pass to VM directly | |
304 | 541 lea(c_rarg1, monitor); // address of first monitor |
0 | 542 |
304 | 543 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
544 testptr(rax, rax); | |
0 | 545 jcc(Assembler::notZero, unlock); |
546 | |
547 pop(state); | |
548 if (throw_monitor_exception) { | |
549 // Entry already unlocked, need to throw exception | |
550 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
551 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
552 should_not_reach_here(); | |
553 } else { | |
554 // Monitor already unlocked during a stack unroll. If requested, | |
555 // install an illegal_monitor_state_exception. Continue with | |
556 // stack unrolling. | |
557 if (install_monitor_exception) { | |
558 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
559 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
560 } | |
561 jmp(unlocked); | |
562 } | |
563 | |
564 bind(unlock); | |
565 unlock_object(c_rarg1); | |
566 pop(state); | |
567 | |
568 // Check that for block-structured locking (i.e., that all locked | |
569 // objects has been unlocked) | |
570 bind(unlocked); | |
571 | |
572 // rax: Might contain return value | |
573 | |
574 // Check that all monitors are unlocked | |
575 { | |
576 Label loop, exception, entry, restart; | |
577 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
578 const Address monitor_block_top( | |
579 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
580 const Address monitor_block_bot( | |
581 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
582 | |
583 bind(restart); | |
584 // We use c_rarg1 so that if we go slow path it will be the correct | |
585 // register for unlock_object to pass to VM directly | |
304 | 586 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 587 // with top-most entry |
304 | 588 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 589 // monitor block |
590 jmp(entry); | |
591 | |
592 // Entry already locked, need to throw exception | |
593 bind(exception); | |
594 | |
595 if (throw_monitor_exception) { | |
596 // Throw exception | |
597 MacroAssembler::call_VM(noreg, | |
598 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
599 throw_illegal_monitor_state_exception)); | |
600 should_not_reach_here(); | |
601 } else { | |
602 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
603 // Unlock does not block, so don't have to worry about the frame. | |
604 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
605 | |
606 push(state); | |
607 unlock_object(c_rarg1); | |
608 pop(state); | |
609 | |
610 if (install_monitor_exception) { | |
611 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
612 InterpreterRuntime:: | |
613 new_illegal_monitor_state_exception)); | |
614 } | |
615 | |
616 jmp(restart); | |
617 } | |
618 | |
619 bind(loop); | |
620 // check if current entry is used | |
304 | 621 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 622 jcc(Assembler::notEqual, exception); |
623 | |
304 | 624 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 625 bind(entry); |
304 | 626 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 627 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
628 } | |
629 | |
630 bind(no_unlock); | |
631 | |
632 // jvmti support | |
633 if (notify_jvmdi) { | |
634 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
635 } else { | |
636 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
637 } | |
638 | |
639 // remove activation | |
640 // get sender sp | |
304 | 641 movptr(rbx, |
642 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 643 leave(); // remove frame anchor |
304 | 644 pop(ret_addr); // get return address |
645 mov(rsp, rbx); // set sp to sender sp | |
0 | 646 } |
647 | |
304 | 648 #endif // C_INTERP |
649 | |
0 | 650 // Lock object |
651 // | |
652 // Args: | |
653 // c_rarg1: BasicObjectLock to be used for locking | |
654 // | |
655 // Kills: | |
656 // rax | |
657 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
658 // rscratch1, rscratch2 (scratch regs) | |
659 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
660 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
661 | |
662 if (UseHeavyMonitors) { | |
663 call_VM(noreg, | |
664 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
665 lock_reg); | |
666 } else { | |
667 Label done; | |
668 | |
669 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
670 const Register obj_reg = c_rarg3; // Will contain the oop | |
671 | |
672 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
673 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
674 const int mark_offset = lock_offset + | |
675 BasicLock::displaced_header_offset_in_bytes(); | |
676 | |
677 Label slow_case; | |
678 | |
679 // Load object pointer into obj_reg %c_rarg3 | |
304 | 680 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 681 |
682 if (UseBiasedLocking) { | |
683 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
684 } | |
685 | |
686 // Load immediate 1 into swap_reg %rax | |
687 movl(swap_reg, 1); | |
688 | |
689 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 690 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 691 |
692 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 693 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 694 |
695 assert(lock_offset == 0, | |
696 "displached header must be first word in BasicObjectLock"); | |
697 | |
698 if (os::is_MP()) lock(); | |
304 | 699 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 700 if (PrintBiasedLockingStatistics) { |
701 cond_inc32(Assembler::zero, | |
702 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
703 } | |
704 jcc(Assembler::zero, done); | |
705 | |
706 // Test if the oopMark is an obvious stack pointer, i.e., | |
707 // 1) (mark & 7) == 0, and | |
708 // 2) rsp <= mark < mark + os::pagesize() | |
709 // | |
710 // These 3 tests can be done by evaluating the following | |
711 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
712 // assuming both stack pointer and pagesize have their | |
713 // least significant 3 bits clear. | |
714 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 715 subptr(swap_reg, rsp); |
716 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 717 |
718 // Save the test result, for recursive case, the result is zero | |
304 | 719 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 720 |
721 if (PrintBiasedLockingStatistics) { | |
722 cond_inc32(Assembler::zero, | |
723 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
724 } | |
725 jcc(Assembler::zero, done); | |
726 | |
727 bind(slow_case); | |
728 | |
729 // Call the runtime routine for slow case | |
730 call_VM(noreg, | |
731 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
732 lock_reg); | |
733 | |
734 bind(done); | |
735 } | |
736 } | |
737 | |
738 | |
739 // Unlocks an object. Used in monitorexit bytecode and | |
740 // remove_activation. Throws an IllegalMonitorException if object is | |
741 // not locked by current thread. | |
742 // | |
743 // Args: | |
744 // c_rarg1: BasicObjectLock for lock | |
745 // | |
746 // Kills: | |
747 // rax | |
748 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
749 // rscratch1, rscratch2 (scratch regs) | |
750 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
751 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
752 | |
753 if (UseHeavyMonitors) { | |
754 call_VM(noreg, | |
755 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
756 lock_reg); | |
757 } else { | |
758 Label done; | |
759 | |
760 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
761 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
762 const Register obj_reg = c_rarg3; // Will contain the oop | |
763 | |
764 save_bcp(); // Save in case of exception | |
765 | |
766 // Convert from BasicObjectLock structure to object and BasicLock | |
767 // structure Store the BasicLock address into %rax | |
304 | 768 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 769 |
770 // Load oop into obj_reg(%c_rarg3) | |
304 | 771 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 772 |
773 // Free entry | |
304 | 774 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 775 |
776 if (UseBiasedLocking) { | |
777 biased_locking_exit(obj_reg, header_reg, done); | |
778 } | |
779 | |
780 // Load the old header from BasicLock structure | |
304 | 781 movptr(header_reg, Address(swap_reg, |
782 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 783 |
784 // Test for recursion | |
304 | 785 testptr(header_reg, header_reg); |
0 | 786 |
787 // zero for recursive case | |
788 jcc(Assembler::zero, done); | |
789 | |
790 // Atomic swap back the old header | |
791 if (os::is_MP()) lock(); | |
304 | 792 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 793 |
794 // zero for recursive case | |
795 jcc(Assembler::zero, done); | |
796 | |
797 // Call the runtime routine for slow case. | |
304 | 798 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 799 obj_reg); // restore obj |
800 call_VM(noreg, | |
801 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
802 lock_reg); | |
803 | |
804 bind(done); | |
805 | |
806 restore_bcp(); | |
807 } | |
808 } | |
809 | |
304 | 810 #ifndef CC_INTERP |
0 | 811 |
812 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
813 Label& zero_continue) { | |
814 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 815 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
816 testptr(mdp, mdp); | |
0 | 817 jcc(Assembler::zero, zero_continue); |
818 } | |
819 | |
820 | |
821 // Set the method data pointer for the current bcp. | |
822 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
823 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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824 Label set_mdp; |
304 | 825 push(rax); |
826 push(rbx); | |
0 | 827 |
828 get_method(rbx); | |
829 // Test MDO to avoid the call if it is NULL. | |
304 | 830 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
831 testptr(rax, rax); | |
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832 jcc(Assembler::zero, set_mdp); |
0 | 833 // rbx: method |
834 // r13: bcp | |
835 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
836 // rax: mdi | |
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837 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
304 | 838 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
839 addptr(rbx, in_bytes(methodDataOopDesc::data_offset())); | |
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840 addptr(rax, rbx); |
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841 bind(set_mdp); |
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842 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 843 pop(rbx); |
844 pop(rax); | |
0 | 845 } |
846 | |
847 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
848 assert(ProfileInterpreter, "must be profiling interpreter"); | |
849 #ifdef ASSERT | |
850 Label verify_continue; | |
304 | 851 push(rax); |
852 push(rbx); | |
853 push(c_rarg3); | |
854 push(c_rarg2); | |
0 | 855 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
856 get_method(rbx); | |
857 | |
858 // If the mdp is valid, it will point to a DataLayout header which is | |
859 // consistent with the bcp. The converse is highly probable also. | |
622
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860 load_unsigned_short(c_rarg2, |
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861 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
304 | 862 addptr(c_rarg2, Address(rbx, methodOopDesc::const_offset())); |
863 lea(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset())); | |
864 cmpptr(c_rarg2, r13); | |
0 | 865 jcc(Assembler::equal, verify_continue); |
866 // rbx: method | |
867 // r13: bcp | |
868 // c_rarg3: mdp | |
869 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
870 rbx, r13, c_rarg3); | |
871 bind(verify_continue); | |
304 | 872 pop(c_rarg2); |
873 pop(c_rarg3); | |
874 pop(rbx); | |
875 pop(rax); | |
0 | 876 #endif // ASSERT |
877 } | |
878 | |
879 | |
880 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
881 int constant, | |
882 Register value) { | |
883 assert(ProfileInterpreter, "must be profiling interpreter"); | |
884 Address data(mdp_in, constant); | |
304 | 885 movptr(data, value); |
0 | 886 } |
887 | |
888 | |
889 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
890 int constant, | |
891 bool decrement) { | |
892 // Counter address | |
893 Address data(mdp_in, constant); | |
894 | |
895 increment_mdp_data_at(data, decrement); | |
896 } | |
897 | |
898 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
899 bool decrement) { | |
900 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 901 // %%% this does 64bit counters at best it is wasting space |
902 // at worst it is a rare bug when counters overflow | |
0 | 903 |
904 if (decrement) { | |
905 // Decrement the register. Set condition codes. | |
304 | 906 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 907 // If the decrement causes the counter to overflow, stay negative |
908 Label L; | |
909 jcc(Assembler::negative, L); | |
304 | 910 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 911 bind(L); |
912 } else { | |
913 assert(DataLayout::counter_increment == 1, | |
914 "flow-free idiom only works with 1"); | |
915 // Increment the register. Set carry flag. | |
304 | 916 addptr(data, DataLayout::counter_increment); |
0 | 917 // If the increment causes the counter to overflow, pull back by 1. |
304 | 918 sbbptr(data, (int32_t)0); |
0 | 919 } |
920 } | |
921 | |
922 | |
923 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
924 Register reg, | |
925 int constant, | |
926 bool decrement) { | |
927 Address data(mdp_in, reg, Address::times_1, constant); | |
928 | |
929 increment_mdp_data_at(data, decrement); | |
930 } | |
931 | |
932 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
933 int flag_byte_constant) { | |
934 assert(ProfileInterpreter, "must be profiling interpreter"); | |
935 int header_offset = in_bytes(DataLayout::header_offset()); | |
936 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
937 // Set the flag | |
938 orl(Address(mdp_in, header_offset), header_bits); | |
939 } | |
940 | |
941 | |
942 | |
943 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
944 int offset, | |
945 Register value, | |
946 Register test_value_out, | |
947 Label& not_equal_continue) { | |
948 assert(ProfileInterpreter, "must be profiling interpreter"); | |
949 if (test_value_out == noreg) { | |
304 | 950 cmpptr(value, Address(mdp_in, offset)); |
0 | 951 } else { |
952 // Put the test value into a register, so caller can use it: | |
304 | 953 movptr(test_value_out, Address(mdp_in, offset)); |
954 cmpptr(test_value_out, value); | |
0 | 955 } |
956 jcc(Assembler::notEqual, not_equal_continue); | |
957 } | |
958 | |
959 | |
960 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
961 int offset_of_disp) { | |
962 assert(ProfileInterpreter, "must be profiling interpreter"); | |
963 Address disp_address(mdp_in, offset_of_disp); | |
304 | 964 addptr(mdp_in, disp_address); |
965 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 966 } |
967 | |
968 | |
969 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
970 Register reg, | |
971 int offset_of_disp) { | |
972 assert(ProfileInterpreter, "must be profiling interpreter"); | |
973 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 974 addptr(mdp_in, disp_address); |
975 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 976 } |
977 | |
978 | |
979 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
980 int constant) { | |
981 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 982 addptr(mdp_in, constant); |
983 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 984 } |
985 | |
986 | |
987 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
988 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 989 push(return_bci); // save/restore across call_VM |
0 | 990 call_VM(noreg, |
991 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
992 return_bci); | |
304 | 993 pop(return_bci); |
0 | 994 } |
995 | |
996 | |
997 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
998 Register bumped_count) { | |
999 if (ProfileInterpreter) { | |
1000 Label profile_continue; | |
1001 | |
1002 // If no method data exists, go to profile_continue. | |
1003 // Otherwise, assign to mdp | |
1004 test_method_data_pointer(mdp, profile_continue); | |
1005 | |
1006 // We are taking a branch. Increment the taken count. | |
1007 // We inline increment_mdp_data_at to return bumped_count in a register | |
1008 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1009 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1010 movptr(bumped_count, data); |
0 | 1011 assert(DataLayout::counter_increment == 1, |
1012 "flow-free idiom only works with 1"); | |
304 | 1013 addptr(bumped_count, DataLayout::counter_increment); |
1014 sbbptr(bumped_count, 0); | |
1015 movptr(data, bumped_count); // Store back out | |
0 | 1016 |
1017 // The method data pointer needs to be updated to reflect the new target. | |
1018 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1019 bind(profile_continue); | |
1020 } | |
1021 } | |
1022 | |
1023 | |
1024 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1025 if (ProfileInterpreter) { | |
1026 Label profile_continue; | |
1027 | |
1028 // If no method data exists, go to profile_continue. | |
1029 test_method_data_pointer(mdp, profile_continue); | |
1030 | |
1031 // We are taking a branch. Increment the not taken count. | |
1032 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1033 | |
1034 // The method data pointer needs to be updated to correspond to | |
1035 // the next bytecode | |
1036 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1037 bind(profile_continue); | |
1038 } | |
1039 } | |
1040 | |
1041 | |
1042 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1043 if (ProfileInterpreter) { | |
1044 Label profile_continue; | |
1045 | |
1046 // If no method data exists, go to profile_continue. | |
1047 test_method_data_pointer(mdp, profile_continue); | |
1048 | |
1049 // We are making a call. Increment the count. | |
1050 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1051 | |
1052 // The method data pointer needs to be updated to reflect the new target. | |
1053 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1054 bind(profile_continue); | |
1055 } | |
1056 } | |
1057 | |
1058 | |
1059 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1060 if (ProfileInterpreter) { | |
1061 Label profile_continue; | |
1062 | |
1063 // If no method data exists, go to profile_continue. | |
1064 test_method_data_pointer(mdp, profile_continue); | |
1065 | |
1066 // We are making a call. Increment the count. | |
1067 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1068 | |
1069 // The method data pointer needs to be updated to reflect the new target. | |
1070 update_mdp_by_constant(mdp, | |
1071 in_bytes(VirtualCallData:: | |
1072 virtual_call_data_size())); | |
1073 bind(profile_continue); | |
1074 } | |
1075 } | |
1076 | |
1077 | |
1078 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1079 Register mdp, | |
1108 | 1080 Register reg2, |
1081 bool receiver_can_be_null) { | |
0 | 1082 if (ProfileInterpreter) { |
1083 Label profile_continue; | |
1084 | |
1085 // If no method data exists, go to profile_continue. | |
1086 test_method_data_pointer(mdp, profile_continue); | |
1087 | |
1108 | 1088 Label skip_receiver_profile; |
1089 if (receiver_can_be_null) { | |
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1090 Label not_null; |
1108 | 1091 testptr(receiver, receiver); |
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1092 jccb(Assembler::notZero, not_null); |
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1093 // We are making a call. Increment the count for null receiver. |
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1094 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1095 jmp(skip_receiver_profile); |
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1096 bind(not_null); |
1108 | 1097 } |
1098 | |
0 | 1099 // Record the receiver type. |
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1100 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1101 bind(skip_receiver_profile); |
0 | 1102 |
1103 // The method data pointer needs to be updated to reflect the new target. | |
1104 update_mdp_by_constant(mdp, | |
1105 in_bytes(VirtualCallData:: | |
1106 virtual_call_data_size())); | |
1107 bind(profile_continue); | |
1108 } | |
1109 } | |
1110 | |
1111 // This routine creates a state machine for updating the multi-row | |
1112 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1113 // The machine visits each row (of receiver/count) until the receiver type | |
1114 // is found, or until it runs out of rows. At the same time, it remembers | |
1115 // the location of the first empty row. (An empty row records null for its | |
1116 // receiver, and can be allocated for a newly-observed receiver type.) | |
1117 // Because there are two degrees of freedom in the state, a simple linear | |
1118 // search will not work; it must be a decision tree. Hence this helper | |
1119 // function is recursive, to generate the required tree structured code. | |
1120 // It's the interpreter, so we are trading off code space for speed. | |
1121 // See below for example code. | |
1122 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1123 Register receiver, Register mdp, | |
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1124 Register reg2, int start_row, |
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1125 Label& done, bool is_virtual_call) { |
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1126 if (TypeProfileWidth == 0) { |
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1127 if (is_virtual_call) { |
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1128 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1129 } |
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1130 return; |
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1131 } |
967
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1132 |
0 | 1133 int last_row = VirtualCallData::row_limit() - 1; |
1134 assert(start_row <= last_row, "must be work left to do"); | |
1135 // Test this row for both the receiver and for null. | |
1136 // Take any of three different outcomes: | |
1137 // 1. found receiver => increment count and goto done | |
1138 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1139 // 3. found something else => keep looking for cases 1 and 2 | |
1140 // Case 3 is handled by a recursive call. | |
1141 for (int row = start_row; row <= last_row; row++) { | |
1142 Label next_test; | |
1143 bool test_for_null_also = (row == start_row); | |
1144 | |
1145 // See if the receiver is receiver[n]. | |
1146 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1147 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1148 (test_for_null_also ? reg2 : noreg), | |
1149 next_test); | |
1150 // (Reg2 now contains the receiver from the CallData.) | |
1151 | |
1152 // The receiver is receiver[n]. Increment count[n]. | |
1153 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1154 increment_mdp_data_at(mdp, count_offset); | |
1155 jmp(done); | |
1156 bind(next_test); | |
1157 | |
1158 if (test_for_null_also) { | |
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1159 Label found_null; |
0 | 1160 // Failed the equality check on receiver[n]... Test for null. |
304 | 1161 testptr(reg2, reg2); |
0 | 1162 if (start_row == last_row) { |
1163 // The only thing left to do is handle the null case. | |
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1164 if (is_virtual_call) { |
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1165 jccb(Assembler::zero, found_null); |
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1166 // Receiver did not match any saved receiver and there is no empty row for it. |
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1167 // Increment total counter to indicate polymorphic case. |
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1168 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1169 jmp(done); |
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1170 bind(found_null); |
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1171 } else { |
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1172 jcc(Assembler::notZero, done); |
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1173 } |
0 | 1174 break; |
1175 } | |
1176 // Since null is rare, make it be the branch-taken case. | |
1177 jcc(Assembler::zero, found_null); | |
1178 | |
1179 // Put all the "Case 3" tests here. | |
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1180 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
0 | 1181 |
1182 // Found a null. Keep searching for a matching receiver, | |
1183 // but remember that this is an empty (unused) slot. | |
1184 bind(found_null); | |
1185 } | |
1186 } | |
1187 | |
1188 // In the fall-through case, we found no matching receiver, but we | |
1189 // observed the receiver[start_row] is NULL. | |
1190 | |
1191 // Fill in the receiver field and increment the count. | |
1192 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1193 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1194 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1195 movl(reg2, DataLayout::counter_increment); | |
1196 set_mdp_data_at(mdp, count_offset, reg2); | |
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1197 if (start_row > 0) { |
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1198 jmp(done); |
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1199 } |
0 | 1200 } |
1201 | |
1202 // Example state machine code for three profile rows: | |
1203 // // main copy of decision tree, rooted at row[1] | |
1204 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1205 // if (row[0].rec != NULL) { | |
1206 // // inner copy of decision tree, rooted at row[1] | |
1207 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1208 // if (row[1].rec != NULL) { | |
1209 // // degenerate decision tree, rooted at row[2] | |
1210 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
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1211 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1212 // row[2].init(rec); goto done; |
1213 // } else { | |
1214 // // remember row[1] is empty | |
1215 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1216 // row[1].init(rec); goto done; | |
1217 // } | |
1218 // } else { | |
1219 // // remember row[0] is empty | |
1220 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1221 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1222 // row[0].init(rec); goto done; | |
1223 // } | |
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1224 // done: |
0 | 1225 |
1226 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
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1227 Register mdp, Register reg2, |
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1228 bool is_virtual_call) { |
0 | 1229 assert(ProfileInterpreter, "must be profiling"); |
1230 Label done; | |
1231 | |
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1232 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
0 | 1233 |
1234 bind (done); | |
1235 } | |
1236 | |
1237 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1238 Register mdp) { | |
1239 if (ProfileInterpreter) { | |
1240 Label profile_continue; | |
1241 uint row; | |
1242 | |
1243 // If no method data exists, go to profile_continue. | |
1244 test_method_data_pointer(mdp, profile_continue); | |
1245 | |
1246 // Update the total ret count. | |
1247 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1248 | |
1249 for (row = 0; row < RetData::row_limit(); row++) { | |
1250 Label next_test; | |
1251 | |
1252 // See if return_bci is equal to bci[n]: | |
1253 test_mdp_data_at(mdp, | |
1254 in_bytes(RetData::bci_offset(row)), | |
1255 return_bci, noreg, | |
1256 next_test); | |
1257 | |
1258 // return_bci is equal to bci[n]. Increment the count. | |
1259 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1260 | |
1261 // The method data pointer needs to be updated to reflect the new target. | |
1262 update_mdp_by_offset(mdp, | |
1263 in_bytes(RetData::bci_displacement_offset(row))); | |
1264 jmp(profile_continue); | |
1265 bind(next_test); | |
1266 } | |
1267 | |
1268 update_mdp_for_ret(return_bci); | |
1269 | |
1270 bind(profile_continue); | |
1271 } | |
1272 } | |
1273 | |
1274 | |
1275 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1276 if (ProfileInterpreter) { | |
1277 Label profile_continue; | |
1278 | |
1279 // If no method data exists, go to profile_continue. | |
1280 test_method_data_pointer(mdp, profile_continue); | |
1281 | |
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1282 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1283 |
0 | 1284 // The method data pointer needs to be updated. |
1285 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1286 if (TypeProfileCasts) { | |
1287 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1288 } | |
1289 update_mdp_by_constant(mdp, mdp_delta); | |
1290 | |
1291 bind(profile_continue); | |
1292 } | |
1293 } | |
1294 | |
1295 | |
1296 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1297 if (ProfileInterpreter && TypeProfileCasts) { | |
1298 Label profile_continue; | |
1299 | |
1300 // If no method data exists, go to profile_continue. | |
1301 test_method_data_pointer(mdp, profile_continue); | |
1302 | |
1303 int count_offset = in_bytes(CounterData::count_offset()); | |
1304 // Back up the address, since we have already bumped the mdp. | |
1305 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1306 | |
1307 // *Decrement* the counter. We expect to see zero or small negatives. | |
1308 increment_mdp_data_at(mdp, count_offset, true); | |
1309 | |
1310 bind (profile_continue); | |
1311 } | |
1312 } | |
1313 | |
1314 | |
1315 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1316 if (ProfileInterpreter) { | |
1317 Label profile_continue; | |
1318 | |
1319 // If no method data exists, go to profile_continue. | |
1320 test_method_data_pointer(mdp, profile_continue); | |
1321 | |
1322 // The method data pointer needs to be updated. | |
1323 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1324 if (TypeProfileCasts) { | |
1325 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1326 | |
1327 // Record the object type. | |
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1328 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1329 } |
1330 update_mdp_by_constant(mdp, mdp_delta); | |
1331 | |
1332 bind(profile_continue); | |
1333 } | |
1334 } | |
1335 | |
1336 | |
1337 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
1338 if (ProfileInterpreter) { | |
1339 Label profile_continue; | |
1340 | |
1341 // If no method data exists, go to profile_continue. | |
1342 test_method_data_pointer(mdp, profile_continue); | |
1343 | |
1344 // Update the default case count | |
1345 increment_mdp_data_at(mdp, | |
1346 in_bytes(MultiBranchData::default_count_offset())); | |
1347 | |
1348 // The method data pointer needs to be updated. | |
1349 update_mdp_by_offset(mdp, | |
1350 in_bytes(MultiBranchData:: | |
1351 default_displacement_offset())); | |
1352 | |
1353 bind(profile_continue); | |
1354 } | |
1355 } | |
1356 | |
1357 | |
1358 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1359 Register mdp, | |
1360 Register reg2) { | |
1361 if (ProfileInterpreter) { | |
1362 Label profile_continue; | |
1363 | |
1364 // If no method data exists, go to profile_continue. | |
1365 test_method_data_pointer(mdp, profile_continue); | |
1366 | |
1367 // Build the base (index * per_case_size_in_bytes()) + | |
1368 // case_array_offset_in_bytes() | |
1369 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1370 imulptr(index, reg2); // XXX l ? |
1371 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1372 |
1373 // Update the case count | |
1374 increment_mdp_data_at(mdp, | |
1375 index, | |
1376 in_bytes(MultiBranchData::relative_count_offset())); | |
1377 | |
1378 // The method data pointer needs to be updated. | |
1379 update_mdp_by_offset(mdp, | |
1380 index, | |
1381 in_bytes(MultiBranchData:: | |
1382 relative_displacement_offset())); | |
1383 | |
1384 bind(profile_continue); | |
1385 } | |
1386 } | |
1387 | |
1388 | |
304 | 1389 |
0 | 1390 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1391 if (state == atos) { | |
1392 MacroAssembler::verify_oop(reg); | |
1393 } | |
1394 } | |
1395 | |
1396 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1397 } | |
304 | 1398 #endif // !CC_INTERP |
0 | 1399 |
1400 | |
1401 void InterpreterMacroAssembler::notify_method_entry() { | |
1402 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1403 // track stack depth. If it is possible to enter interp_only_mode we add | |
1404 // the code to check if the event should be sent. | |
1405 if (JvmtiExport::can_post_interpreter_events()) { | |
1406 Label L; | |
1407 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1408 testl(rdx, rdx); | |
1409 jcc(Assembler::zero, L); | |
1410 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1411 InterpreterRuntime::post_method_entry)); | |
1412 bind(L); | |
1413 } | |
1414 | |
1415 { | |
1416 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1417 get_method(c_rarg1); | |
1418 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1419 r15_thread, c_rarg1); | |
1420 } | |
610
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1421 |
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1422 // RedefineClasses() tracing support for obsolete method entry |
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1423 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1424 get_method(c_rarg1); |
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1425 call_VM_leaf( |
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1426 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1427 r15_thread, c_rarg1); |
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1428 } |
0 | 1429 } |
1430 | |
1431 | |
1432 void InterpreterMacroAssembler::notify_method_exit( | |
1433 TosState state, NotifyMethodExitMode mode) { | |
1434 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1435 // track stack depth. If it is possible to enter interp_only_mode we add | |
1436 // the code to check if the event should be sent. | |
1437 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1438 Label L; | |
1439 // Note: frame::interpreter_frame_result has a dependency on how the | |
1440 // method result is saved across the call to post_method_exit. If this | |
1441 // is changed then the interpreter_frame_result implementation will | |
1442 // need to be updated too. | |
304 | 1443 |
1444 // For c++ interpreter the result is always stored at a known location in the frame | |
1445 // template interpreter will leave it on the top of the stack. | |
1446 NOT_CC_INTERP(push(state);) | |
0 | 1447 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1448 testl(rdx, rdx); | |
1449 jcc(Assembler::zero, L); | |
1450 call_VM(noreg, | |
1451 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1452 bind(L); | |
304 | 1453 NOT_CC_INTERP(pop(state)); |
0 | 1454 } |
1455 | |
1456 { | |
1457 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1458 NOT_CC_INTERP(push(state)); |
0 | 1459 get_method(c_rarg1); |
1460 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1461 r15_thread, c_rarg1); | |
304 | 1462 NOT_CC_INTERP(pop(state)); |
0 | 1463 } |
1464 } | |
1783 | 1465 |
1466 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1467 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1468 int increment, int mask, | |
1469 Register scratch, bool preloaded, | |
1470 Condition cond, Label* where) { | |
1471 if (!preloaded) { | |
1472 movl(scratch, counter_addr); | |
1473 } | |
1474 incrementl(scratch, increment); | |
1475 movl(counter_addr, scratch); | |
1476 andl(scratch, mask); | |
1477 jcc(cond, *where); | |
1478 } |