Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 7199:cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
Reviewed-by: kvn
author | twisti |
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date | Fri, 30 Nov 2012 15:23:16 -0800 |
parents | da91efe96a93 |
children | e522a00b91aa f34d701e952e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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" | |
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31 #include "oops/methodData.hpp" |
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32 #include "oops/method.hpp" |
1972 | 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. | |
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224 assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); |
1108 | 225 notl(index); // convert to plain index |
1565 | 226 } else if (index_size == sizeof(u1)) { |
227 load_unsigned_byte(index, Address(r13, bcp_offset)); | |
228 } else { | |
229 ShouldNotReachHere(); | |
1108 | 230 } |
231 } | |
232 | |
233 | |
0 | 234 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, |
235 Register index, | |
1108 | 236 int bcp_offset, |
1565 | 237 size_t index_size) { |
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238 assert_different_registers(cache, index); |
1565 | 239 get_cache_index_at_bcp(index, bcp_offset, index_size); |
304 | 240 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 241 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
242 // convert from field index to ConstantPoolCacheEntry index | |
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243 assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line"); |
0 | 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, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
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258 const int shift_count = (1 + byte_no) * BitsPerByte; |
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259 assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) || |
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260 (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift), |
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261 "correct shift count"); |
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262 shrl(bytecode, shift_count); |
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263 assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask"); |
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264 andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask); |
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265 } |
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266 |
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267 |
0 | 268 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, |
269 Register tmp, | |
1108 | 270 int bcp_offset, |
1565 | 271 size_t index_size) { |
0 | 272 assert(cache != tmp, "must use different register"); |
1565 | 273 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
0 | 274 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
275 // convert from field index to ConstantPoolCacheEntry index | |
276 // and from word offset to byte offset | |
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277 assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line"); |
0 | 278 shll(tmp, 2 + LogBytesPerWord); |
304 | 279 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
0 | 280 // skip past the header |
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281 addptr(cache, in_bytes(ConstantPoolCache::base_offset())); |
304 | 282 addptr(cache, tmp); // construct pointer to cache entry |
0 | 283 } |
284 | |
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285 // Load object from cpool->resolved_references(index) |
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286 void InterpreterMacroAssembler::load_resolved_reference_at_index( |
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287 Register result, Register index) { |
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288 assert_different_registers(result, index); |
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289 // convert from field index to resolved_references() index and from |
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290 // word index to byte offset. Since this is a java object, it can be compressed |
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291 Register tmp = index; // reuse |
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292 shll(tmp, LogBytesPerHeapOop); |
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293 |
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294 get_constant_pool(result); |
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295 // load pointer for resolved_references[] objArray |
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296 movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes())); |
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297 // JNIHandles::resolve(obj); |
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298 movptr(result, Address(result, 0)); |
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299 // Add in the index |
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300 addptr(result, tmp); |
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301 load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); |
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302 } |
0 | 303 |
304 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
305 // subtype of super_klass. | |
306 // | |
307 // Args: | |
308 // rax: superklass | |
309 // Rsub_klass: subklass | |
310 // | |
311 // Kills: | |
312 // rcx, rdi | |
313 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
314 Label& ok_is_subtype) { | |
315 assert(Rsub_klass != rax, "rax holds superklass"); | |
316 assert(Rsub_klass != r14, "r14 holds locals"); | |
317 assert(Rsub_klass != r13, "r13 holds bcp"); | |
318 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
319 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
320 | |
321 // Profile the not-null value's klass. | |
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322 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
0 | 323 |
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324 // Do the check. |
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325 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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326 |
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327 // Profile the failure of the check. |
0 | 328 profile_typecheck_failed(rcx); // blows rcx |
329 } | |
330 | |
331 | |
304 | 332 |
0 | 333 // Java Expression Stack |
334 | |
335 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
304 | 336 pop(r); |
0 | 337 } |
338 | |
339 void InterpreterMacroAssembler::pop_i(Register r) { | |
304 | 340 // XXX can't use pop currently, upper half non clean |
0 | 341 movl(r, Address(rsp, 0)); |
304 | 342 addptr(rsp, wordSize); |
0 | 343 } |
344 | |
345 void InterpreterMacroAssembler::pop_l(Register r) { | |
346 movq(r, Address(rsp, 0)); | |
1506 | 347 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 348 } |
349 | |
350 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
351 movflt(r, Address(rsp, 0)); | |
304 | 352 addptr(rsp, wordSize); |
0 | 353 } |
354 | |
355 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
356 movdbl(r, Address(rsp, 0)); | |
1506 | 357 addptr(rsp, 2 * Interpreter::stackElementSize); |
0 | 358 } |
359 | |
360 void InterpreterMacroAssembler::push_ptr(Register r) { | |
304 | 361 push(r); |
0 | 362 } |
363 | |
364 void InterpreterMacroAssembler::push_i(Register r) { | |
304 | 365 push(r); |
0 | 366 } |
367 | |
368 void InterpreterMacroAssembler::push_l(Register r) { | |
1506 | 369 subptr(rsp, 2 * wordSize); |
0 | 370 movq(Address(rsp, 0), r); |
371 } | |
372 | |
373 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
304 | 374 subptr(rsp, wordSize); |
0 | 375 movflt(Address(rsp, 0), r); |
376 } | |
377 | |
378 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
1506 | 379 subptr(rsp, 2 * wordSize); |
0 | 380 movdbl(Address(rsp, 0), r); |
381 } | |
382 | |
383 void InterpreterMacroAssembler::pop(TosState state) { | |
384 switch (state) { | |
385 case atos: pop_ptr(); break; | |
386 case btos: | |
387 case ctos: | |
388 case stos: | |
389 case itos: pop_i(); break; | |
390 case ltos: pop_l(); break; | |
391 case ftos: pop_f(); break; | |
392 case dtos: pop_d(); break; | |
393 case vtos: /* nothing to do */ break; | |
394 default: ShouldNotReachHere(); | |
395 } | |
396 verify_oop(rax, state); | |
397 } | |
398 | |
399 void InterpreterMacroAssembler::push(TosState state) { | |
400 verify_oop(rax, state); | |
401 switch (state) { | |
402 case atos: push_ptr(); break; | |
403 case btos: | |
404 case ctos: | |
405 case stos: | |
406 case itos: push_i(); break; | |
407 case ltos: push_l(); break; | |
408 case ftos: push_f(); break; | |
409 case dtos: push_d(); break; | |
410 case vtos: /* nothing to do */ break; | |
411 default : ShouldNotReachHere(); | |
412 } | |
413 } | |
414 | |
415 | |
1506 | 416 // Helpers for swap and dup |
417 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
304 | 418 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
0 | 419 } |
420 | |
1506 | 421 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
422 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
0 | 423 } |
424 | |
425 | |
710 | 426 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
0 | 427 // set sender sp |
304 | 428 lea(r13, Address(rsp, wordSize)); |
0 | 429 // record last_sp |
304 | 430 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
710 | 431 } |
432 | |
433 | |
434 // Jump to from_interpreted entry of a call unless single stepping is possible | |
435 // in this thread in which case we must call the i2i entry | |
436 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
437 prepare_to_jump_from_interpreted(); | |
0 | 438 |
439 if (JvmtiExport::can_post_interpreter_events()) { | |
440 Label run_compiled_code; | |
441 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
442 // compiled code in threads for which the event is enabled. Check here for | |
443 // interp_only_mode if these events CAN be enabled. | |
444 // interp_only is an int, on little endian it is sufficient to test the byte only | |
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445 // Is a cmpl faster? |
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446 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
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447 jccb(Assembler::zero, run_compiled_code); |
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448 jmp(Address(method, Method::interpreter_entry_offset())); |
0 | 449 bind(run_compiled_code); |
450 } | |
451 | |
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452 jmp(Address(method, Method::from_interpreted_offset())); |
0 | 453 |
454 } | |
455 | |
456 | |
457 // The following two routines provide a hook so that an implementation | |
458 // can schedule the dispatch in two parts. amd64 does not do this. | |
459 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
460 // Nothing amd64 specific to be done here | |
461 } | |
462 | |
463 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
464 dispatch_next(state, step); | |
465 } | |
466 | |
467 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
468 address* table, | |
469 bool verifyoop) { | |
470 verify_FPU(1, state); | |
471 if (VerifyActivationFrameSize) { | |
472 Label L; | |
304 | 473 mov(rcx, rbp); |
474 subptr(rcx, rsp); | |
475 int32_t min_frame_size = | |
0 | 476 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
477 wordSize; | |
304 | 478 cmpptr(rcx, (int32_t)min_frame_size); |
0 | 479 jcc(Assembler::greaterEqual, L); |
480 stop("broken stack frame"); | |
481 bind(L); | |
482 } | |
483 if (verifyoop) { | |
484 verify_oop(rax, state); | |
485 } | |
486 lea(rscratch1, ExternalAddress((address)table)); | |
487 jmp(Address(rscratch1, rbx, Address::times_8)); | |
488 } | |
489 | |
490 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
491 dispatch_base(state, Interpreter::dispatch_table(state)); | |
492 } | |
493 | |
494 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
495 dispatch_base(state, Interpreter::normal_table(state)); | |
496 } | |
497 | |
498 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
499 dispatch_base(state, Interpreter::normal_table(state), false); | |
500 } | |
501 | |
502 | |
503 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
504 // load next bytecode (load before advancing r13 to prevent AGI) | |
505 load_unsigned_byte(rbx, Address(r13, step)); | |
506 // advance r13 | |
304 | 507 increment(r13, step); |
0 | 508 dispatch_base(state, Interpreter::dispatch_table(state)); |
509 } | |
510 | |
511 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
512 // load current bytecode | |
513 load_unsigned_byte(rbx, Address(r13, 0)); | |
514 dispatch_base(state, table); | |
515 } | |
516 | |
517 // remove activation | |
518 // | |
519 // Unlock the receiver if this is a synchronized method. | |
520 // Unlock any Java monitors from syncronized blocks. | |
521 // Remove the activation from the stack. | |
522 // | |
523 // If there are locked Java monitors | |
524 // If throw_monitor_exception | |
525 // throws IllegalMonitorStateException | |
526 // Else if install_monitor_exception | |
527 // installs IllegalMonitorStateException | |
528 // Else | |
529 // no error processing | |
530 void InterpreterMacroAssembler::remove_activation( | |
531 TosState state, | |
532 Register ret_addr, | |
533 bool throw_monitor_exception, | |
534 bool install_monitor_exception, | |
535 bool notify_jvmdi) { | |
536 // Note: Registers rdx xmm0 may be in use for the | |
537 // result check if synchronized method | |
538 Label unlocked, unlock, no_unlock; | |
539 | |
540 // get the value of _do_not_unlock_if_synchronized into rdx | |
541 const Address do_not_unlock_if_synchronized(r15_thread, | |
542 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
543 movbool(rdx, do_not_unlock_if_synchronized); | |
544 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
545 | |
546 // get method access flags | |
304 | 547 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
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548 movl(rcx, Address(rbx, Method::access_flags_offset())); |
0 | 549 testl(rcx, JVM_ACC_SYNCHRONIZED); |
550 jcc(Assembler::zero, unlocked); | |
551 | |
552 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
553 // is set. | |
554 testbool(rdx); | |
555 jcc(Assembler::notZero, no_unlock); | |
556 | |
557 // unlock monitor | |
558 push(state); // save result | |
559 | |
560 // BasicObjectLock will be first in list, since this is a | |
561 // synchronized method. However, need to check that the object has | |
562 // not been unlocked by an explicit monitorexit bytecode. | |
563 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
564 wordSize - (int) sizeof(BasicObjectLock)); | |
565 // We use c_rarg1 so that if we go slow path it will be the correct | |
566 // register for unlock_object to pass to VM directly | |
304 | 567 lea(c_rarg1, monitor); // address of first monitor |
0 | 568 |
304 | 569 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
570 testptr(rax, rax); | |
0 | 571 jcc(Assembler::notZero, unlock); |
572 | |
573 pop(state); | |
574 if (throw_monitor_exception) { | |
575 // Entry already unlocked, need to throw exception | |
576 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
577 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
578 should_not_reach_here(); | |
579 } else { | |
580 // Monitor already unlocked during a stack unroll. If requested, | |
581 // install an illegal_monitor_state_exception. Continue with | |
582 // stack unrolling. | |
583 if (install_monitor_exception) { | |
584 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
585 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
586 } | |
587 jmp(unlocked); | |
588 } | |
589 | |
590 bind(unlock); | |
591 unlock_object(c_rarg1); | |
592 pop(state); | |
593 | |
594 // Check that for block-structured locking (i.e., that all locked | |
595 // objects has been unlocked) | |
596 bind(unlocked); | |
597 | |
598 // rax: Might contain return value | |
599 | |
600 // Check that all monitors are unlocked | |
601 { | |
602 Label loop, exception, entry, restart; | |
603 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
604 const Address monitor_block_top( | |
605 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
606 const Address monitor_block_bot( | |
607 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
608 | |
609 bind(restart); | |
610 // We use c_rarg1 so that if we go slow path it will be the correct | |
611 // register for unlock_object to pass to VM directly | |
304 | 612 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
0 | 613 // with top-most entry |
304 | 614 lea(rbx, monitor_block_bot); // points to word before bottom of |
0 | 615 // monitor block |
616 jmp(entry); | |
617 | |
618 // Entry already locked, need to throw exception | |
619 bind(exception); | |
620 | |
621 if (throw_monitor_exception) { | |
622 // Throw exception | |
623 MacroAssembler::call_VM(noreg, | |
624 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
625 throw_illegal_monitor_state_exception)); | |
626 should_not_reach_here(); | |
627 } else { | |
628 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
629 // Unlock does not block, so don't have to worry about the frame. | |
630 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
631 | |
632 push(state); | |
633 unlock_object(c_rarg1); | |
634 pop(state); | |
635 | |
636 if (install_monitor_exception) { | |
637 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
638 InterpreterRuntime:: | |
639 new_illegal_monitor_state_exception)); | |
640 } | |
641 | |
642 jmp(restart); | |
643 } | |
644 | |
645 bind(loop); | |
646 // check if current entry is used | |
304 | 647 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
0 | 648 jcc(Assembler::notEqual, exception); |
649 | |
304 | 650 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
0 | 651 bind(entry); |
304 | 652 cmpptr(c_rarg1, rbx); // check if bottom reached |
0 | 653 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
654 } | |
655 | |
656 bind(no_unlock); | |
657 | |
658 // jvmti support | |
659 if (notify_jvmdi) { | |
660 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
661 } else { | |
662 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
663 } | |
664 | |
665 // remove activation | |
666 // get sender sp | |
304 | 667 movptr(rbx, |
668 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
0 | 669 leave(); // remove frame anchor |
304 | 670 pop(ret_addr); // get return address |
671 mov(rsp, rbx); // set sp to sender sp | |
0 | 672 } |
673 | |
304 | 674 #endif // C_INTERP |
675 | |
0 | 676 // Lock object |
677 // | |
678 // Args: | |
679 // c_rarg1: BasicObjectLock to be used for locking | |
680 // | |
681 // Kills: | |
682 // rax | |
683 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
684 // rscratch1, rscratch2 (scratch regs) | |
685 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
686 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
687 | |
688 if (UseHeavyMonitors) { | |
689 call_VM(noreg, | |
690 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
691 lock_reg); | |
692 } else { | |
693 Label done; | |
694 | |
695 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
696 const Register obj_reg = c_rarg3; // Will contain the oop | |
697 | |
698 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
699 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
700 const int mark_offset = lock_offset + | |
701 BasicLock::displaced_header_offset_in_bytes(); | |
702 | |
703 Label slow_case; | |
704 | |
705 // Load object pointer into obj_reg %c_rarg3 | |
304 | 706 movptr(obj_reg, Address(lock_reg, obj_offset)); |
0 | 707 |
708 if (UseBiasedLocking) { | |
709 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
710 } | |
711 | |
712 // Load immediate 1 into swap_reg %rax | |
713 movl(swap_reg, 1); | |
714 | |
715 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 716 orptr(swap_reg, Address(obj_reg, 0)); |
0 | 717 |
718 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 719 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 720 |
721 assert(lock_offset == 0, | |
722 "displached header must be first word in BasicObjectLock"); | |
723 | |
724 if (os::is_MP()) lock(); | |
304 | 725 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 726 if (PrintBiasedLockingStatistics) { |
727 cond_inc32(Assembler::zero, | |
728 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
729 } | |
730 jcc(Assembler::zero, done); | |
731 | |
732 // Test if the oopMark is an obvious stack pointer, i.e., | |
733 // 1) (mark & 7) == 0, and | |
734 // 2) rsp <= mark < mark + os::pagesize() | |
735 // | |
736 // These 3 tests can be done by evaluating the following | |
737 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
738 // assuming both stack pointer and pagesize have their | |
739 // least significant 3 bits clear. | |
740 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
304 | 741 subptr(swap_reg, rsp); |
742 andptr(swap_reg, 7 - os::vm_page_size()); | |
0 | 743 |
744 // Save the test result, for recursive case, the result is zero | |
304 | 745 movptr(Address(lock_reg, mark_offset), swap_reg); |
0 | 746 |
747 if (PrintBiasedLockingStatistics) { | |
748 cond_inc32(Assembler::zero, | |
749 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
750 } | |
751 jcc(Assembler::zero, done); | |
752 | |
753 bind(slow_case); | |
754 | |
755 // Call the runtime routine for slow case | |
756 call_VM(noreg, | |
757 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
758 lock_reg); | |
759 | |
760 bind(done); | |
761 } | |
762 } | |
763 | |
764 | |
765 // Unlocks an object. Used in monitorexit bytecode and | |
766 // remove_activation. Throws an IllegalMonitorException if object is | |
767 // not locked by current thread. | |
768 // | |
769 // Args: | |
770 // c_rarg1: BasicObjectLock for lock | |
771 // | |
772 // Kills: | |
773 // rax | |
774 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
775 // rscratch1, rscratch2 (scratch regs) | |
776 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
777 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
778 | |
779 if (UseHeavyMonitors) { | |
780 call_VM(noreg, | |
781 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
782 lock_reg); | |
783 } else { | |
784 Label done; | |
785 | |
786 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
787 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
788 const Register obj_reg = c_rarg3; // Will contain the oop | |
789 | |
790 save_bcp(); // Save in case of exception | |
791 | |
792 // Convert from BasicObjectLock structure to object and BasicLock | |
793 // structure Store the BasicLock address into %rax | |
304 | 794 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
0 | 795 |
796 // Load oop into obj_reg(%c_rarg3) | |
304 | 797 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
0 | 798 |
799 // Free entry | |
304 | 800 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
0 | 801 |
802 if (UseBiasedLocking) { | |
803 biased_locking_exit(obj_reg, header_reg, done); | |
804 } | |
805 | |
806 // Load the old header from BasicLock structure | |
304 | 807 movptr(header_reg, Address(swap_reg, |
808 BasicLock::displaced_header_offset_in_bytes())); | |
0 | 809 |
810 // Test for recursion | |
304 | 811 testptr(header_reg, header_reg); |
0 | 812 |
813 // zero for recursive case | |
814 jcc(Assembler::zero, done); | |
815 | |
816 // Atomic swap back the old header | |
817 if (os::is_MP()) lock(); | |
304 | 818 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
0 | 819 |
820 // zero for recursive case | |
821 jcc(Assembler::zero, done); | |
822 | |
823 // Call the runtime routine for slow case. | |
304 | 824 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
0 | 825 obj_reg); // restore obj |
826 call_VM(noreg, | |
827 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
828 lock_reg); | |
829 | |
830 bind(done); | |
831 | |
832 restore_bcp(); | |
833 } | |
834 } | |
835 | |
304 | 836 #ifndef CC_INTERP |
0 | 837 |
838 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
839 Label& zero_continue) { | |
840 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 841 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
842 testptr(mdp, mdp); | |
0 | 843 jcc(Assembler::zero, zero_continue); |
844 } | |
845 | |
846 | |
847 // Set the method data pointer for the current bcp. | |
848 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
849 assert(ProfileInterpreter, "must be profiling interpreter"); | |
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850 Label set_mdp; |
304 | 851 push(rax); |
852 push(rbx); | |
0 | 853 |
854 get_method(rbx); | |
855 // Test MDO to avoid the call if it is NULL. | |
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856 movptr(rax, Address(rbx, in_bytes(Method::method_data_offset()))); |
304 | 857 testptr(rax, rax); |
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858 jcc(Assembler::zero, set_mdp); |
0 | 859 // rbx: method |
860 // r13: bcp | |
861 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
862 // rax: mdi | |
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863 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
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864 movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset()))); |
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865 addptr(rbx, in_bytes(MethodData::data_offset())); |
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866 addptr(rax, rbx); |
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867 bind(set_mdp); |
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868 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
304 | 869 pop(rbx); |
870 pop(rax); | |
0 | 871 } |
872 | |
873 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
874 assert(ProfileInterpreter, "must be profiling interpreter"); | |
875 #ifdef ASSERT | |
876 Label verify_continue; | |
304 | 877 push(rax); |
878 push(rbx); | |
879 push(c_rarg3); | |
880 push(c_rarg2); | |
0 | 881 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
882 get_method(rbx); | |
883 | |
884 // If the mdp is valid, it will point to a DataLayout header which is | |
885 // consistent with the bcp. The converse is highly probable also. | |
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886 load_unsigned_short(c_rarg2, |
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887 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
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888 addptr(c_rarg2, Address(rbx, Method::const_offset())); |
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889 lea(c_rarg2, Address(c_rarg2, ConstMethod::codes_offset())); |
304 | 890 cmpptr(c_rarg2, r13); |
0 | 891 jcc(Assembler::equal, verify_continue); |
892 // rbx: method | |
893 // r13: bcp | |
894 // c_rarg3: mdp | |
895 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
896 rbx, r13, c_rarg3); | |
897 bind(verify_continue); | |
304 | 898 pop(c_rarg2); |
899 pop(c_rarg3); | |
900 pop(rbx); | |
901 pop(rax); | |
0 | 902 #endif // ASSERT |
903 } | |
904 | |
905 | |
906 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
907 int constant, | |
908 Register value) { | |
909 assert(ProfileInterpreter, "must be profiling interpreter"); | |
910 Address data(mdp_in, constant); | |
304 | 911 movptr(data, value); |
0 | 912 } |
913 | |
914 | |
915 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
916 int constant, | |
917 bool decrement) { | |
918 // Counter address | |
919 Address data(mdp_in, constant); | |
920 | |
921 increment_mdp_data_at(data, decrement); | |
922 } | |
923 | |
924 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
925 bool decrement) { | |
926 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 927 // %%% this does 64bit counters at best it is wasting space |
928 // at worst it is a rare bug when counters overflow | |
0 | 929 |
930 if (decrement) { | |
931 // Decrement the register. Set condition codes. | |
304 | 932 addptr(data, (int32_t) -DataLayout::counter_increment); |
0 | 933 // If the decrement causes the counter to overflow, stay negative |
934 Label L; | |
935 jcc(Assembler::negative, L); | |
304 | 936 addptr(data, (int32_t) DataLayout::counter_increment); |
0 | 937 bind(L); |
938 } else { | |
939 assert(DataLayout::counter_increment == 1, | |
940 "flow-free idiom only works with 1"); | |
941 // Increment the register. Set carry flag. | |
304 | 942 addptr(data, DataLayout::counter_increment); |
0 | 943 // If the increment causes the counter to overflow, pull back by 1. |
304 | 944 sbbptr(data, (int32_t)0); |
0 | 945 } |
946 } | |
947 | |
948 | |
949 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
950 Register reg, | |
951 int constant, | |
952 bool decrement) { | |
953 Address data(mdp_in, reg, Address::times_1, constant); | |
954 | |
955 increment_mdp_data_at(data, decrement); | |
956 } | |
957 | |
958 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
959 int flag_byte_constant) { | |
960 assert(ProfileInterpreter, "must be profiling interpreter"); | |
961 int header_offset = in_bytes(DataLayout::header_offset()); | |
962 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
963 // Set the flag | |
964 orl(Address(mdp_in, header_offset), header_bits); | |
965 } | |
966 | |
967 | |
968 | |
969 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
970 int offset, | |
971 Register value, | |
972 Register test_value_out, | |
973 Label& not_equal_continue) { | |
974 assert(ProfileInterpreter, "must be profiling interpreter"); | |
975 if (test_value_out == noreg) { | |
304 | 976 cmpptr(value, Address(mdp_in, offset)); |
0 | 977 } else { |
978 // Put the test value into a register, so caller can use it: | |
304 | 979 movptr(test_value_out, Address(mdp_in, offset)); |
980 cmpptr(test_value_out, value); | |
0 | 981 } |
982 jcc(Assembler::notEqual, not_equal_continue); | |
983 } | |
984 | |
985 | |
986 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
987 int offset_of_disp) { | |
988 assert(ProfileInterpreter, "must be profiling interpreter"); | |
989 Address disp_address(mdp_in, offset_of_disp); | |
304 | 990 addptr(mdp_in, disp_address); |
991 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 992 } |
993 | |
994 | |
995 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
996 Register reg, | |
997 int offset_of_disp) { | |
998 assert(ProfileInterpreter, "must be profiling interpreter"); | |
999 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
304 | 1000 addptr(mdp_in, disp_address); |
1001 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1002 } |
1003 | |
1004 | |
1005 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
1006 int constant) { | |
1007 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1008 addptr(mdp_in, constant); |
1009 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
0 | 1010 } |
1011 | |
1012 | |
1013 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
1014 assert(ProfileInterpreter, "must be profiling interpreter"); | |
304 | 1015 push(return_bci); // save/restore across call_VM |
0 | 1016 call_VM(noreg, |
1017 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
1018 return_bci); | |
304 | 1019 pop(return_bci); |
0 | 1020 } |
1021 | |
1022 | |
1023 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
1024 Register bumped_count) { | |
1025 if (ProfileInterpreter) { | |
1026 Label profile_continue; | |
1027 | |
1028 // If no method data exists, go to profile_continue. | |
1029 // Otherwise, assign to mdp | |
1030 test_method_data_pointer(mdp, profile_continue); | |
1031 | |
1032 // We are taking a branch. Increment the taken count. | |
1033 // We inline increment_mdp_data_at to return bumped_count in a register | |
1034 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
1035 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
304 | 1036 movptr(bumped_count, data); |
0 | 1037 assert(DataLayout::counter_increment == 1, |
1038 "flow-free idiom only works with 1"); | |
304 | 1039 addptr(bumped_count, DataLayout::counter_increment); |
1040 sbbptr(bumped_count, 0); | |
1041 movptr(data, bumped_count); // Store back out | |
0 | 1042 |
1043 // The method data pointer needs to be updated to reflect the new target. | |
1044 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
1045 bind(profile_continue); | |
1046 } | |
1047 } | |
1048 | |
1049 | |
1050 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
1051 if (ProfileInterpreter) { | |
1052 Label profile_continue; | |
1053 | |
1054 // If no method data exists, go to profile_continue. | |
1055 test_method_data_pointer(mdp, profile_continue); | |
1056 | |
1057 // We are taking a branch. Increment the not taken count. | |
1058 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
1059 | |
1060 // The method data pointer needs to be updated to correspond to | |
1061 // the next bytecode | |
1062 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
1063 bind(profile_continue); | |
1064 } | |
1065 } | |
1066 | |
1067 | |
1068 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
1069 if (ProfileInterpreter) { | |
1070 Label profile_continue; | |
1071 | |
1072 // If no method data exists, go to profile_continue. | |
1073 test_method_data_pointer(mdp, profile_continue); | |
1074 | |
1075 // We are making a call. Increment the count. | |
1076 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1077 | |
1078 // The method data pointer needs to be updated to reflect the new target. | |
1079 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
1080 bind(profile_continue); | |
1081 } | |
1082 } | |
1083 | |
1084 | |
1085 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
1086 if (ProfileInterpreter) { | |
1087 Label profile_continue; | |
1088 | |
1089 // If no method data exists, go to profile_continue. | |
1090 test_method_data_pointer(mdp, profile_continue); | |
1091 | |
1092 // We are making a call. Increment the count. | |
1093 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1094 | |
1095 // The method data pointer needs to be updated to reflect the new target. | |
1096 update_mdp_by_constant(mdp, | |
1097 in_bytes(VirtualCallData:: | |
1098 virtual_call_data_size())); | |
1099 bind(profile_continue); | |
1100 } | |
1101 } | |
1102 | |
1103 | |
1104 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
1105 Register mdp, | |
1108 | 1106 Register reg2, |
1107 bool receiver_can_be_null) { | |
0 | 1108 if (ProfileInterpreter) { |
1109 Label profile_continue; | |
1110 | |
1111 // If no method data exists, go to profile_continue. | |
1112 test_method_data_pointer(mdp, profile_continue); | |
1113 | |
1108 | 1114 Label skip_receiver_profile; |
1115 if (receiver_can_be_null) { | |
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1116 Label not_null; |
1108 | 1117 testptr(receiver, receiver); |
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1118 jccb(Assembler::notZero, not_null); |
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1119 // We are making a call. Increment the count for null receiver. |
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1120 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1121 jmp(skip_receiver_profile); |
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1122 bind(not_null); |
1108 | 1123 } |
1124 | |
0 | 1125 // Record the receiver type. |
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1126 record_klass_in_profile(receiver, mdp, reg2, true); |
1108 | 1127 bind(skip_receiver_profile); |
0 | 1128 |
1129 // The method data pointer needs to be updated to reflect the new target. | |
1130 update_mdp_by_constant(mdp, | |
1131 in_bytes(VirtualCallData:: | |
1132 virtual_call_data_size())); | |
1133 bind(profile_continue); | |
1134 } | |
1135 } | |
1136 | |
1137 // This routine creates a state machine for updating the multi-row | |
1138 // type profile at a virtual call site (or other type-sensitive bytecode). | |
1139 // The machine visits each row (of receiver/count) until the receiver type | |
1140 // is found, or until it runs out of rows. At the same time, it remembers | |
1141 // the location of the first empty row. (An empty row records null for its | |
1142 // receiver, and can be allocated for a newly-observed receiver type.) | |
1143 // Because there are two degrees of freedom in the state, a simple linear | |
1144 // search will not work; it must be a decision tree. Hence this helper | |
1145 // function is recursive, to generate the required tree structured code. | |
1146 // It's the interpreter, so we are trading off code space for speed. | |
1147 // See below for example code. | |
1148 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
1149 Register receiver, Register mdp, | |
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1150 Register reg2, int start_row, |
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1151 Label& done, bool is_virtual_call) { |
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1152 if (TypeProfileWidth == 0) { |
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1153 if (is_virtual_call) { |
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1154 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1155 } |
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1156 return; |
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1157 } |
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1158 |
0 | 1159 int last_row = VirtualCallData::row_limit() - 1; |
1160 assert(start_row <= last_row, "must be work left to do"); | |
1161 // Test this row for both the receiver and for null. | |
1162 // Take any of three different outcomes: | |
1163 // 1. found receiver => increment count and goto done | |
1164 // 2. found null => keep looking for case 1, maybe allocate this cell | |
1165 // 3. found something else => keep looking for cases 1 and 2 | |
1166 // Case 3 is handled by a recursive call. | |
1167 for (int row = start_row; row <= last_row; row++) { | |
1168 Label next_test; | |
1169 bool test_for_null_also = (row == start_row); | |
1170 | |
1171 // See if the receiver is receiver[n]. | |
1172 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
1173 test_mdp_data_at(mdp, recvr_offset, receiver, | |
1174 (test_for_null_also ? reg2 : noreg), | |
1175 next_test); | |
1176 // (Reg2 now contains the receiver from the CallData.) | |
1177 | |
1178 // The receiver is receiver[n]. Increment count[n]. | |
1179 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
1180 increment_mdp_data_at(mdp, count_offset); | |
1181 jmp(done); | |
1182 bind(next_test); | |
1183 | |
1184 if (test_for_null_also) { | |
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1185 Label found_null; |
0 | 1186 // Failed the equality check on receiver[n]... Test for null. |
304 | 1187 testptr(reg2, reg2); |
0 | 1188 if (start_row == last_row) { |
1189 // The only thing left to do is handle the null case. | |
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1190 if (is_virtual_call) { |
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1191 jccb(Assembler::zero, found_null); |
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1192 // Receiver did not match any saved receiver and there is no empty row for it. |
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1193 // Increment total counter to indicate polymorphic case. |
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1194 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1195 jmp(done); |
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1196 bind(found_null); |
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1197 } else { |
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1198 jcc(Assembler::notZero, done); |
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1199 } |
0 | 1200 break; |
1201 } | |
1202 // Since null is rare, make it be the branch-taken case. | |
1203 jcc(Assembler::zero, found_null); | |
1204 | |
1205 // Put all the "Case 3" tests here. | |
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1206 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
0 | 1207 |
1208 // Found a null. Keep searching for a matching receiver, | |
1209 // but remember that this is an empty (unused) slot. | |
1210 bind(found_null); | |
1211 } | |
1212 } | |
1213 | |
1214 // In the fall-through case, we found no matching receiver, but we | |
1215 // observed the receiver[start_row] is NULL. | |
1216 | |
1217 // Fill in the receiver field and increment the count. | |
1218 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
1219 set_mdp_data_at(mdp, recvr_offset, receiver); | |
1220 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
1221 movl(reg2, DataLayout::counter_increment); | |
1222 set_mdp_data_at(mdp, count_offset, reg2); | |
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1223 if (start_row > 0) { |
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1224 jmp(done); |
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1225 } |
0 | 1226 } |
1227 | |
1228 // Example state machine code for three profile rows: | |
1229 // // main copy of decision tree, rooted at row[1] | |
1230 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
1231 // if (row[0].rec != NULL) { | |
1232 // // inner copy of decision tree, rooted at row[1] | |
1233 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1234 // if (row[1].rec != NULL) { | |
1235 // // degenerate decision tree, rooted at row[2] | |
1236 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1206
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1237 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
0 | 1238 // row[2].init(rec); goto done; |
1239 // } else { | |
1240 // // remember row[1] is empty | |
1241 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1242 // row[1].init(rec); goto done; | |
1243 // } | |
1244 // } else { | |
1245 // // remember row[0] is empty | |
1246 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
1247 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
1248 // row[0].init(rec); goto done; | |
1249 // } | |
1206
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1250 // done: |
0 | 1251 |
1252 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
1206
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1253 Register mdp, Register reg2, |
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1254 bool is_virtual_call) { |
0 | 1255 assert(ProfileInterpreter, "must be profiling"); |
1256 Label done; | |
1257 | |
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1258 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
0 | 1259 |
1260 bind (done); | |
1261 } | |
1262 | |
1263 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
1264 Register mdp) { | |
1265 if (ProfileInterpreter) { | |
1266 Label profile_continue; | |
1267 uint row; | |
1268 | |
1269 // If no method data exists, go to profile_continue. | |
1270 test_method_data_pointer(mdp, profile_continue); | |
1271 | |
1272 // Update the total ret count. | |
1273 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
1274 | |
1275 for (row = 0; row < RetData::row_limit(); row++) { | |
1276 Label next_test; | |
1277 | |
1278 // See if return_bci is equal to bci[n]: | |
1279 test_mdp_data_at(mdp, | |
1280 in_bytes(RetData::bci_offset(row)), | |
1281 return_bci, noreg, | |
1282 next_test); | |
1283 | |
1284 // return_bci is equal to bci[n]. Increment the count. | |
1285 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
1286 | |
1287 // The method data pointer needs to be updated to reflect the new target. | |
1288 update_mdp_by_offset(mdp, | |
1289 in_bytes(RetData::bci_displacement_offset(row))); | |
1290 jmp(profile_continue); | |
1291 bind(next_test); | |
1292 } | |
1293 | |
1294 update_mdp_for_ret(return_bci); | |
1295 | |
1296 bind(profile_continue); | |
1297 } | |
1298 } | |
1299 | |
1300 | |
1301 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
1302 if (ProfileInterpreter) { | |
1303 Label profile_continue; | |
1304 | |
1305 // If no method data exists, go to profile_continue. | |
1306 test_method_data_pointer(mdp, profile_continue); | |
1307 | |
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1308 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1309 |
0 | 1310 // The method data pointer needs to be updated. |
1311 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1312 if (TypeProfileCasts) { | |
1313 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1314 } | |
1315 update_mdp_by_constant(mdp, mdp_delta); | |
1316 | |
1317 bind(profile_continue); | |
1318 } | |
1319 } | |
1320 | |
1321 | |
1322 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
1323 if (ProfileInterpreter && TypeProfileCasts) { | |
1324 Label profile_continue; | |
1325 | |
1326 // If no method data exists, go to profile_continue. | |
1327 test_method_data_pointer(mdp, profile_continue); | |
1328 | |
1329 int count_offset = in_bytes(CounterData::count_offset()); | |
1330 // Back up the address, since we have already bumped the mdp. | |
1331 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
1332 | |
1333 // *Decrement* the counter. We expect to see zero or small negatives. | |
1334 increment_mdp_data_at(mdp, count_offset, true); | |
1335 | |
1336 bind (profile_continue); | |
1337 } | |
1338 } | |
1339 | |
1340 | |
1341 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
1342 if (ProfileInterpreter) { | |
1343 Label profile_continue; | |
1344 | |
1345 // If no method data exists, go to profile_continue. | |
1346 test_method_data_pointer(mdp, profile_continue); | |
1347 | |
1348 // The method data pointer needs to be updated. | |
1349 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
1350 if (TypeProfileCasts) { | |
1351 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
1352 | |
1353 // Record the object type. | |
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1354 record_klass_in_profile(klass, mdp, reg2, false); |
0 | 1355 } |
1356 update_mdp_by_constant(mdp, mdp_delta); | |
1357 | |
1358 bind(profile_continue); | |
1359 } | |
1360 } | |
1361 | |
1362 | |
1363 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
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 // Update the default case count | |
1371 increment_mdp_data_at(mdp, | |
1372 in_bytes(MultiBranchData::default_count_offset())); | |
1373 | |
1374 // The method data pointer needs to be updated. | |
1375 update_mdp_by_offset(mdp, | |
1376 in_bytes(MultiBranchData:: | |
1377 default_displacement_offset())); | |
1378 | |
1379 bind(profile_continue); | |
1380 } | |
1381 } | |
1382 | |
1383 | |
1384 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
1385 Register mdp, | |
1386 Register reg2) { | |
1387 if (ProfileInterpreter) { | |
1388 Label profile_continue; | |
1389 | |
1390 // If no method data exists, go to profile_continue. | |
1391 test_method_data_pointer(mdp, profile_continue); | |
1392 | |
1393 // Build the base (index * per_case_size_in_bytes()) + | |
1394 // case_array_offset_in_bytes() | |
1395 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
304 | 1396 imulptr(index, reg2); // XXX l ? |
1397 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
0 | 1398 |
1399 // Update the case count | |
1400 increment_mdp_data_at(mdp, | |
1401 index, | |
1402 in_bytes(MultiBranchData::relative_count_offset())); | |
1403 | |
1404 // The method data pointer needs to be updated. | |
1405 update_mdp_by_offset(mdp, | |
1406 index, | |
1407 in_bytes(MultiBranchData:: | |
1408 relative_displacement_offset())); | |
1409 | |
1410 bind(profile_continue); | |
1411 } | |
1412 } | |
1413 | |
1414 | |
304 | 1415 |
0 | 1416 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
1417 if (state == atos) { | |
1418 MacroAssembler::verify_oop(reg); | |
1419 } | |
1420 } | |
1421 | |
1422 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
1423 } | |
304 | 1424 #endif // !CC_INTERP |
0 | 1425 |
1426 | |
1427 void InterpreterMacroAssembler::notify_method_entry() { | |
1428 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1429 // track stack depth. If it is possible to enter interp_only_mode we add | |
1430 // the code to check if the event should be sent. | |
1431 if (JvmtiExport::can_post_interpreter_events()) { | |
1432 Label L; | |
1433 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
1434 testl(rdx, rdx); | |
1435 jcc(Assembler::zero, L); | |
1436 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
1437 InterpreterRuntime::post_method_entry)); | |
1438 bind(L); | |
1439 } | |
1440 | |
1441 { | |
1442 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
1443 get_method(c_rarg1); | |
1444 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
1445 r15_thread, c_rarg1); | |
1446 } | |
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1447 |
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1448 // RedefineClasses() tracing support for obsolete method entry |
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1449 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1450 get_method(c_rarg1); |
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1451 call_VM_leaf( |
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1452 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1453 r15_thread, c_rarg1); |
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1454 } |
0 | 1455 } |
1456 | |
1457 | |
1458 void InterpreterMacroAssembler::notify_method_exit( | |
1459 TosState state, NotifyMethodExitMode mode) { | |
1460 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
1461 // track stack depth. If it is possible to enter interp_only_mode we add | |
1462 // the code to check if the event should be sent. | |
1463 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
1464 Label L; | |
1465 // Note: frame::interpreter_frame_result has a dependency on how the | |
1466 // method result is saved across the call to post_method_exit. If this | |
1467 // is changed then the interpreter_frame_result implementation will | |
1468 // need to be updated too. | |
304 | 1469 |
1470 // For c++ interpreter the result is always stored at a known location in the frame | |
1471 // template interpreter will leave it on the top of the stack. | |
1472 NOT_CC_INTERP(push(state);) | |
0 | 1473 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
1474 testl(rdx, rdx); | |
1475 jcc(Assembler::zero, L); | |
1476 call_VM(noreg, | |
1477 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
1478 bind(L); | |
304 | 1479 NOT_CC_INTERP(pop(state)); |
0 | 1480 } |
1481 | |
1482 { | |
1483 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
304 | 1484 NOT_CC_INTERP(push(state)); |
0 | 1485 get_method(c_rarg1); |
1486 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
1487 r15_thread, c_rarg1); | |
304 | 1488 NOT_CC_INTERP(pop(state)); |
0 | 1489 } |
1490 } | |
1783 | 1491 |
1492 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
1493 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
1494 int increment, int mask, | |
1495 Register scratch, bool preloaded, | |
1496 Condition cond, Label* where) { | |
1497 if (!preloaded) { | |
1498 movl(scratch, counter_addr); | |
1499 } | |
1500 incrementl(scratch, increment); | |
1501 movl(counter_addr, scratch); | |
1502 andl(scratch, mask); | |
1503 jcc(cond, *where); | |
1504 } |