Mercurial > hg > truffle
annotate src/cpu/x86/vm/interp_masm_x86_64.cpp @ 2118:dd031b2226de
4930919: race condition in MDO creation at back branch locations
Summary: Reuse set_method_data_for_bcp() to setup mdp after MDO creation.
Reviewed-by: kvn, never
| author | iveresov |
|---|---|
| date | Mon, 10 Jan 2011 18:46:29 -0800 |
| parents | 0fc262af204f |
| children | 38fea01eb669 |
| rev | line source |
|---|---|
| 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)) { |
| 1108 | 216 assert(EnableInvokeDynamic, "giant index used only for EnableInvokeDynamic"); |
| 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)) { |
| 224 assert(EnableMethodHandles, "tiny index used only for EnableMethodHandles"); | |
| 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) { |
| 0 | 236 assert(cache != index, "must use different registers"); |
| 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 | |
| 245 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache, | |
| 246 Register tmp, | |
| 1108 | 247 int bcp_offset, |
| 1565 | 248 size_t index_size) { |
| 0 | 249 assert(cache != tmp, "must use different register"); |
| 1565 | 250 get_cache_index_at_bcp(tmp, bcp_offset, index_size); |
| 0 | 251 assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below"); |
| 252 // convert from field index to ConstantPoolCacheEntry index | |
| 253 // and from word offset to byte offset | |
| 254 shll(tmp, 2 + LogBytesPerWord); | |
| 304 | 255 movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize)); |
| 0 | 256 // skip past the header |
| 304 | 257 addptr(cache, in_bytes(constantPoolCacheOopDesc::base_offset())); |
| 258 addptr(cache, tmp); // construct pointer to cache entry | |
| 0 | 259 } |
| 260 | |
| 261 | |
| 262 // Generate a subtype check: branch to ok_is_subtype if sub_klass is a | |
| 263 // subtype of super_klass. | |
| 264 // | |
| 265 // Args: | |
| 266 // rax: superklass | |
| 267 // Rsub_klass: subklass | |
| 268 // | |
| 269 // Kills: | |
| 270 // rcx, rdi | |
| 271 void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, | |
| 272 Label& ok_is_subtype) { | |
| 273 assert(Rsub_klass != rax, "rax holds superklass"); | |
| 274 assert(Rsub_klass != r14, "r14 holds locals"); | |
| 275 assert(Rsub_klass != r13, "r13 holds bcp"); | |
| 276 assert(Rsub_klass != rcx, "rcx holds 2ndary super array length"); | |
| 277 assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr"); | |
| 278 | |
| 279 // Profile the not-null value's klass. | |
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280 profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi |
| 0 | 281 |
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282 // Do the check. |
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283 check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx |
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285 // Profile the failure of the check. |
| 0 | 286 profile_typecheck_failed(rcx); // blows rcx |
| 287 } | |
| 288 | |
| 289 | |
| 304 | 290 |
| 0 | 291 // Java Expression Stack |
| 292 | |
| 293 void InterpreterMacroAssembler::pop_ptr(Register r) { | |
| 304 | 294 pop(r); |
| 0 | 295 } |
| 296 | |
| 297 void InterpreterMacroAssembler::pop_i(Register r) { | |
| 304 | 298 // XXX can't use pop currently, upper half non clean |
| 0 | 299 movl(r, Address(rsp, 0)); |
| 304 | 300 addptr(rsp, wordSize); |
| 0 | 301 } |
| 302 | |
| 303 void InterpreterMacroAssembler::pop_l(Register r) { | |
| 304 movq(r, Address(rsp, 0)); | |
| 1506 | 305 addptr(rsp, 2 * Interpreter::stackElementSize); |
| 0 | 306 } |
| 307 | |
| 308 void InterpreterMacroAssembler::pop_f(XMMRegister r) { | |
| 309 movflt(r, Address(rsp, 0)); | |
| 304 | 310 addptr(rsp, wordSize); |
| 0 | 311 } |
| 312 | |
| 313 void InterpreterMacroAssembler::pop_d(XMMRegister r) { | |
| 314 movdbl(r, Address(rsp, 0)); | |
| 1506 | 315 addptr(rsp, 2 * Interpreter::stackElementSize); |
| 0 | 316 } |
| 317 | |
| 318 void InterpreterMacroAssembler::push_ptr(Register r) { | |
| 304 | 319 push(r); |
| 0 | 320 } |
| 321 | |
| 322 void InterpreterMacroAssembler::push_i(Register r) { | |
| 304 | 323 push(r); |
| 0 | 324 } |
| 325 | |
| 326 void InterpreterMacroAssembler::push_l(Register r) { | |
| 1506 | 327 subptr(rsp, 2 * wordSize); |
| 0 | 328 movq(Address(rsp, 0), r); |
| 329 } | |
| 330 | |
| 331 void InterpreterMacroAssembler::push_f(XMMRegister r) { | |
| 304 | 332 subptr(rsp, wordSize); |
| 0 | 333 movflt(Address(rsp, 0), r); |
| 334 } | |
| 335 | |
| 336 void InterpreterMacroAssembler::push_d(XMMRegister r) { | |
| 1506 | 337 subptr(rsp, 2 * wordSize); |
| 0 | 338 movdbl(Address(rsp, 0), r); |
| 339 } | |
| 340 | |
| 341 void InterpreterMacroAssembler::pop(TosState state) { | |
| 342 switch (state) { | |
| 343 case atos: pop_ptr(); break; | |
| 344 case btos: | |
| 345 case ctos: | |
| 346 case stos: | |
| 347 case itos: pop_i(); break; | |
| 348 case ltos: pop_l(); break; | |
| 349 case ftos: pop_f(); break; | |
| 350 case dtos: pop_d(); break; | |
| 351 case vtos: /* nothing to do */ break; | |
| 352 default: ShouldNotReachHere(); | |
| 353 } | |
| 354 verify_oop(rax, state); | |
| 355 } | |
| 356 | |
| 357 void InterpreterMacroAssembler::push(TosState state) { | |
| 358 verify_oop(rax, state); | |
| 359 switch (state) { | |
| 360 case atos: push_ptr(); break; | |
| 361 case btos: | |
| 362 case ctos: | |
| 363 case stos: | |
| 364 case itos: push_i(); break; | |
| 365 case ltos: push_l(); break; | |
| 366 case ftos: push_f(); break; | |
| 367 case dtos: push_d(); break; | |
| 368 case vtos: /* nothing to do */ break; | |
| 369 default : ShouldNotReachHere(); | |
| 370 } | |
| 371 } | |
| 372 | |
| 373 | |
| 1506 | 374 // Helpers for swap and dup |
| 375 void InterpreterMacroAssembler::load_ptr(int n, Register val) { | |
| 304 | 376 movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n))); |
| 0 | 377 } |
| 378 | |
| 1506 | 379 void InterpreterMacroAssembler::store_ptr(int n, Register val) { |
| 380 movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val); | |
| 0 | 381 } |
| 382 | |
| 383 | |
| 384 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) { | |
| 385 MacroAssembler::call_VM_leaf_base(entry_point, 0); | |
| 386 } | |
| 387 | |
| 388 | |
| 389 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
| 390 Register arg_1) { | |
| 391 if (c_rarg0 != arg_1) { | |
| 304 | 392 mov(c_rarg0, arg_1); |
| 0 | 393 } |
| 394 MacroAssembler::call_VM_leaf_base(entry_point, 1); | |
| 395 } | |
| 396 | |
| 397 | |
| 398 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
| 399 Register arg_1, | |
| 400 Register arg_2) { | |
| 401 assert(c_rarg0 != arg_2, "smashed argument"); | |
| 402 assert(c_rarg1 != arg_1, "smashed argument"); | |
| 403 if (c_rarg0 != arg_1) { | |
| 304 | 404 mov(c_rarg0, arg_1); |
| 0 | 405 } |
| 406 if (c_rarg1 != arg_2) { | |
| 304 | 407 mov(c_rarg1, arg_2); |
| 0 | 408 } |
| 409 MacroAssembler::call_VM_leaf_base(entry_point, 2); | |
| 410 } | |
| 411 | |
| 412 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point, | |
| 413 Register arg_1, | |
| 414 Register arg_2, | |
| 415 Register arg_3) { | |
| 416 assert(c_rarg0 != arg_2, "smashed argument"); | |
| 417 assert(c_rarg0 != arg_3, "smashed argument"); | |
| 418 assert(c_rarg1 != arg_1, "smashed argument"); | |
| 419 assert(c_rarg1 != arg_3, "smashed argument"); | |
| 420 assert(c_rarg2 != arg_1, "smashed argument"); | |
| 421 assert(c_rarg2 != arg_2, "smashed argument"); | |
| 422 if (c_rarg0 != arg_1) { | |
| 304 | 423 mov(c_rarg0, arg_1); |
| 0 | 424 } |
| 425 if (c_rarg1 != arg_2) { | |
| 304 | 426 mov(c_rarg1, arg_2); |
| 0 | 427 } |
| 428 if (c_rarg2 != arg_3) { | |
| 304 | 429 mov(c_rarg2, arg_3); |
| 0 | 430 } |
| 431 MacroAssembler::call_VM_leaf_base(entry_point, 3); | |
| 432 } | |
| 433 | |
| 710 | 434 void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() { |
| 0 | 435 // set sender sp |
| 304 | 436 lea(r13, Address(rsp, wordSize)); |
| 0 | 437 // record last_sp |
| 304 | 438 movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), r13); |
| 710 | 439 } |
| 440 | |
| 441 | |
| 442 // Jump to from_interpreted entry of a call unless single stepping is possible | |
| 443 // in this thread in which case we must call the i2i entry | |
| 444 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) { | |
| 445 prepare_to_jump_from_interpreted(); | |
| 0 | 446 |
| 447 if (JvmtiExport::can_post_interpreter_events()) { | |
| 448 Label run_compiled_code; | |
| 449 // JVMTI events, such as single-stepping, are implemented partly by avoiding running | |
| 450 // compiled code in threads for which the event is enabled. Check here for | |
| 451 // interp_only_mode if these events CAN be enabled. | |
| 452 // interp_only is an int, on little endian it is sufficient to test the byte only | |
|
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453 // Is a cmpl faster? |
|
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|
454 cmpb(Address(r15_thread, JavaThread::interp_only_mode_offset()), 0); |
| 0 | 455 jcc(Assembler::zero, run_compiled_code); |
| 456 jmp(Address(method, methodOopDesc::interpreter_entry_offset())); | |
| 457 bind(run_compiled_code); | |
| 458 } | |
| 459 | |
| 460 jmp(Address(method, methodOopDesc::from_interpreted_offset())); | |
| 461 | |
| 462 } | |
| 463 | |
| 464 | |
| 465 // The following two routines provide a hook so that an implementation | |
| 466 // can schedule the dispatch in two parts. amd64 does not do this. | |
| 467 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) { | |
| 468 // Nothing amd64 specific to be done here | |
| 469 } | |
| 470 | |
| 471 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) { | |
| 472 dispatch_next(state, step); | |
| 473 } | |
| 474 | |
| 475 void InterpreterMacroAssembler::dispatch_base(TosState state, | |
| 476 address* table, | |
| 477 bool verifyoop) { | |
| 478 verify_FPU(1, state); | |
| 479 if (VerifyActivationFrameSize) { | |
| 480 Label L; | |
| 304 | 481 mov(rcx, rbp); |
| 482 subptr(rcx, rsp); | |
| 483 int32_t min_frame_size = | |
| 0 | 484 (frame::link_offset - frame::interpreter_frame_initial_sp_offset) * |
| 485 wordSize; | |
| 304 | 486 cmpptr(rcx, (int32_t)min_frame_size); |
| 0 | 487 jcc(Assembler::greaterEqual, L); |
| 488 stop("broken stack frame"); | |
| 489 bind(L); | |
| 490 } | |
| 491 if (verifyoop) { | |
| 492 verify_oop(rax, state); | |
| 493 } | |
| 494 lea(rscratch1, ExternalAddress((address)table)); | |
| 495 jmp(Address(rscratch1, rbx, Address::times_8)); | |
| 496 } | |
| 497 | |
| 498 void InterpreterMacroAssembler::dispatch_only(TosState state) { | |
| 499 dispatch_base(state, Interpreter::dispatch_table(state)); | |
| 500 } | |
| 501 | |
| 502 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) { | |
| 503 dispatch_base(state, Interpreter::normal_table(state)); | |
| 504 } | |
| 505 | |
| 506 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) { | |
| 507 dispatch_base(state, Interpreter::normal_table(state), false); | |
| 508 } | |
| 509 | |
| 510 | |
| 511 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) { | |
| 512 // load next bytecode (load before advancing r13 to prevent AGI) | |
| 513 load_unsigned_byte(rbx, Address(r13, step)); | |
| 514 // advance r13 | |
| 304 | 515 increment(r13, step); |
| 0 | 516 dispatch_base(state, Interpreter::dispatch_table(state)); |
| 517 } | |
| 518 | |
| 519 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { | |
| 520 // load current bytecode | |
| 521 load_unsigned_byte(rbx, Address(r13, 0)); | |
| 522 dispatch_base(state, table); | |
| 523 } | |
| 524 | |
| 525 // remove activation | |
| 526 // | |
| 527 // Unlock the receiver if this is a synchronized method. | |
| 528 // Unlock any Java monitors from syncronized blocks. | |
| 529 // Remove the activation from the stack. | |
| 530 // | |
| 531 // If there are locked Java monitors | |
| 532 // If throw_monitor_exception | |
| 533 // throws IllegalMonitorStateException | |
| 534 // Else if install_monitor_exception | |
| 535 // installs IllegalMonitorStateException | |
| 536 // Else | |
| 537 // no error processing | |
| 538 void InterpreterMacroAssembler::remove_activation( | |
| 539 TosState state, | |
| 540 Register ret_addr, | |
| 541 bool throw_monitor_exception, | |
| 542 bool install_monitor_exception, | |
| 543 bool notify_jvmdi) { | |
| 544 // Note: Registers rdx xmm0 may be in use for the | |
| 545 // result check if synchronized method | |
| 546 Label unlocked, unlock, no_unlock; | |
| 547 | |
| 548 // get the value of _do_not_unlock_if_synchronized into rdx | |
| 549 const Address do_not_unlock_if_synchronized(r15_thread, | |
| 550 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); | |
| 551 movbool(rdx, do_not_unlock_if_synchronized); | |
| 552 movbool(do_not_unlock_if_synchronized, false); // reset the flag | |
| 553 | |
| 554 // get method access flags | |
| 304 | 555 movptr(rbx, Address(rbp, frame::interpreter_frame_method_offset * wordSize)); |
| 0 | 556 movl(rcx, Address(rbx, methodOopDesc::access_flags_offset())); |
| 557 testl(rcx, JVM_ACC_SYNCHRONIZED); | |
| 558 jcc(Assembler::zero, unlocked); | |
| 559 | |
| 560 // Don't unlock anything if the _do_not_unlock_if_synchronized flag | |
| 561 // is set. | |
| 562 testbool(rdx); | |
| 563 jcc(Assembler::notZero, no_unlock); | |
| 564 | |
| 565 // unlock monitor | |
| 566 push(state); // save result | |
| 567 | |
| 568 // BasicObjectLock will be first in list, since this is a | |
| 569 // synchronized method. However, need to check that the object has | |
| 570 // not been unlocked by an explicit monitorexit bytecode. | |
| 571 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * | |
| 572 wordSize - (int) sizeof(BasicObjectLock)); | |
| 573 // We use c_rarg1 so that if we go slow path it will be the correct | |
| 574 // register for unlock_object to pass to VM directly | |
| 304 | 575 lea(c_rarg1, monitor); // address of first monitor |
| 0 | 576 |
| 304 | 577 movptr(rax, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes())); |
| 578 testptr(rax, rax); | |
| 0 | 579 jcc(Assembler::notZero, unlock); |
| 580 | |
| 581 pop(state); | |
| 582 if (throw_monitor_exception) { | |
| 583 // Entry already unlocked, need to throw exception | |
| 584 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
| 585 InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
| 586 should_not_reach_here(); | |
| 587 } else { | |
| 588 // Monitor already unlocked during a stack unroll. If requested, | |
| 589 // install an illegal_monitor_state_exception. Continue with | |
| 590 // stack unrolling. | |
| 591 if (install_monitor_exception) { | |
| 592 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
| 593 InterpreterRuntime::new_illegal_monitor_state_exception)); | |
| 594 } | |
| 595 jmp(unlocked); | |
| 596 } | |
| 597 | |
| 598 bind(unlock); | |
| 599 unlock_object(c_rarg1); | |
| 600 pop(state); | |
| 601 | |
| 602 // Check that for block-structured locking (i.e., that all locked | |
| 603 // objects has been unlocked) | |
| 604 bind(unlocked); | |
| 605 | |
| 606 // rax: Might contain return value | |
| 607 | |
| 608 // Check that all monitors are unlocked | |
| 609 { | |
| 610 Label loop, exception, entry, restart; | |
| 611 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
| 612 const Address monitor_block_top( | |
| 613 rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
| 614 const Address monitor_block_bot( | |
| 615 rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
| 616 | |
| 617 bind(restart); | |
| 618 // We use c_rarg1 so that if we go slow path it will be the correct | |
| 619 // register for unlock_object to pass to VM directly | |
| 304 | 620 movptr(c_rarg1, monitor_block_top); // points to current entry, starting |
| 0 | 621 // with top-most entry |
| 304 | 622 lea(rbx, monitor_block_bot); // points to word before bottom of |
| 0 | 623 // monitor block |
| 624 jmp(entry); | |
| 625 | |
| 626 // Entry already locked, need to throw exception | |
| 627 bind(exception); | |
| 628 | |
| 629 if (throw_monitor_exception) { | |
| 630 // Throw exception | |
| 631 MacroAssembler::call_VM(noreg, | |
| 632 CAST_FROM_FN_PTR(address, InterpreterRuntime:: | |
| 633 throw_illegal_monitor_state_exception)); | |
| 634 should_not_reach_here(); | |
| 635 } else { | |
| 636 // Stack unrolling. Unlock object and install illegal_monitor_exception. | |
| 637 // Unlock does not block, so don't have to worry about the frame. | |
| 638 // We don't have to preserve c_rarg1 since we are going to throw an exception. | |
| 639 | |
| 640 push(state); | |
| 641 unlock_object(c_rarg1); | |
| 642 pop(state); | |
| 643 | |
| 644 if (install_monitor_exception) { | |
| 645 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
| 646 InterpreterRuntime:: | |
| 647 new_illegal_monitor_state_exception)); | |
| 648 } | |
| 649 | |
| 650 jmp(restart); | |
| 651 } | |
| 652 | |
| 653 bind(loop); | |
| 654 // check if current entry is used | |
| 304 | 655 cmpptr(Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL); |
| 0 | 656 jcc(Assembler::notEqual, exception); |
| 657 | |
| 304 | 658 addptr(c_rarg1, entry_size); // otherwise advance to next entry |
| 0 | 659 bind(entry); |
| 304 | 660 cmpptr(c_rarg1, rbx); // check if bottom reached |
| 0 | 661 jcc(Assembler::notEqual, loop); // if not at bottom then check this entry |
| 662 } | |
| 663 | |
| 664 bind(no_unlock); | |
| 665 | |
| 666 // jvmti support | |
| 667 if (notify_jvmdi) { | |
| 668 notify_method_exit(state, NotifyJVMTI); // preserve TOSCA | |
| 669 } else { | |
| 670 notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA | |
| 671 } | |
| 672 | |
| 673 // remove activation | |
| 674 // get sender sp | |
| 304 | 675 movptr(rbx, |
| 676 Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); | |
| 0 | 677 leave(); // remove frame anchor |
| 304 | 678 pop(ret_addr); // get return address |
| 679 mov(rsp, rbx); // set sp to sender sp | |
| 0 | 680 } |
| 681 | |
| 304 | 682 #endif // C_INTERP |
| 683 | |
| 0 | 684 // Lock object |
| 685 // | |
| 686 // Args: | |
| 687 // c_rarg1: BasicObjectLock to be used for locking | |
| 688 // | |
| 689 // Kills: | |
| 690 // rax | |
| 691 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs) | |
| 692 // rscratch1, rscratch2 (scratch regs) | |
| 693 void InterpreterMacroAssembler::lock_object(Register lock_reg) { | |
| 694 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be c_rarg1"); | |
| 695 | |
| 696 if (UseHeavyMonitors) { | |
| 697 call_VM(noreg, | |
| 698 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
| 699 lock_reg); | |
| 700 } else { | |
| 701 Label done; | |
| 702 | |
| 703 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
| 704 const Register obj_reg = c_rarg3; // Will contain the oop | |
| 705 | |
| 706 const int obj_offset = BasicObjectLock::obj_offset_in_bytes(); | |
| 707 const int lock_offset = BasicObjectLock::lock_offset_in_bytes (); | |
| 708 const int mark_offset = lock_offset + | |
| 709 BasicLock::displaced_header_offset_in_bytes(); | |
| 710 | |
| 711 Label slow_case; | |
| 712 | |
| 713 // Load object pointer into obj_reg %c_rarg3 | |
| 304 | 714 movptr(obj_reg, Address(lock_reg, obj_offset)); |
| 0 | 715 |
| 716 if (UseBiasedLocking) { | |
| 717 biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case); | |
| 718 } | |
| 719 | |
| 720 // Load immediate 1 into swap_reg %rax | |
| 721 movl(swap_reg, 1); | |
| 722 | |
| 723 // Load (object->mark() | 1) into swap_reg %rax | |
| 304 | 724 orptr(swap_reg, Address(obj_reg, 0)); |
| 0 | 725 |
| 726 // Save (object->mark() | 1) into BasicLock's displaced header | |
| 304 | 727 movptr(Address(lock_reg, mark_offset), swap_reg); |
| 0 | 728 |
| 729 assert(lock_offset == 0, | |
| 730 "displached header must be first word in BasicObjectLock"); | |
| 731 | |
| 732 if (os::is_MP()) lock(); | |
| 304 | 733 cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
| 0 | 734 if (PrintBiasedLockingStatistics) { |
| 735 cond_inc32(Assembler::zero, | |
| 736 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
| 737 } | |
| 738 jcc(Assembler::zero, done); | |
| 739 | |
| 740 // Test if the oopMark is an obvious stack pointer, i.e., | |
| 741 // 1) (mark & 7) == 0, and | |
| 742 // 2) rsp <= mark < mark + os::pagesize() | |
| 743 // | |
| 744 // These 3 tests can be done by evaluating the following | |
| 745 // expression: ((mark - rsp) & (7 - os::vm_page_size())), | |
| 746 // assuming both stack pointer and pagesize have their | |
| 747 // least significant 3 bits clear. | |
| 748 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
| 304 | 749 subptr(swap_reg, rsp); |
| 750 andptr(swap_reg, 7 - os::vm_page_size()); | |
| 0 | 751 |
| 752 // Save the test result, for recursive case, the result is zero | |
| 304 | 753 movptr(Address(lock_reg, mark_offset), swap_reg); |
| 0 | 754 |
| 755 if (PrintBiasedLockingStatistics) { | |
| 756 cond_inc32(Assembler::zero, | |
| 757 ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr())); | |
| 758 } | |
| 759 jcc(Assembler::zero, done); | |
| 760 | |
| 761 bind(slow_case); | |
| 762 | |
| 763 // Call the runtime routine for slow case | |
| 764 call_VM(noreg, | |
| 765 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), | |
| 766 lock_reg); | |
| 767 | |
| 768 bind(done); | |
| 769 } | |
| 770 } | |
| 771 | |
| 772 | |
| 773 // Unlocks an object. Used in monitorexit bytecode and | |
| 774 // remove_activation. Throws an IllegalMonitorException if object is | |
| 775 // not locked by current thread. | |
| 776 // | |
| 777 // Args: | |
| 778 // c_rarg1: BasicObjectLock for lock | |
| 779 // | |
| 780 // Kills: | |
| 781 // rax | |
| 782 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs) | |
| 783 // rscratch1, rscratch2 (scratch regs) | |
| 784 void InterpreterMacroAssembler::unlock_object(Register lock_reg) { | |
| 785 assert(lock_reg == c_rarg1, "The argument is only for looks. It must be rarg1"); | |
| 786 | |
| 787 if (UseHeavyMonitors) { | |
| 788 call_VM(noreg, | |
| 789 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
| 790 lock_reg); | |
| 791 } else { | |
| 792 Label done; | |
| 793 | |
| 794 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
| 795 const Register header_reg = c_rarg2; // Will contain the old oopMark | |
| 796 const Register obj_reg = c_rarg3; // Will contain the oop | |
| 797 | |
| 798 save_bcp(); // Save in case of exception | |
| 799 | |
| 800 // Convert from BasicObjectLock structure to object and BasicLock | |
| 801 // structure Store the BasicLock address into %rax | |
| 304 | 802 lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes())); |
| 0 | 803 |
| 804 // Load oop into obj_reg(%c_rarg3) | |
| 304 | 805 movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes())); |
| 0 | 806 |
| 807 // Free entry | |
| 304 | 808 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD); |
| 0 | 809 |
| 810 if (UseBiasedLocking) { | |
| 811 biased_locking_exit(obj_reg, header_reg, done); | |
| 812 } | |
| 813 | |
| 814 // Load the old header from BasicLock structure | |
| 304 | 815 movptr(header_reg, Address(swap_reg, |
| 816 BasicLock::displaced_header_offset_in_bytes())); | |
| 0 | 817 |
| 818 // Test for recursion | |
| 304 | 819 testptr(header_reg, header_reg); |
| 0 | 820 |
| 821 // zero for recursive case | |
| 822 jcc(Assembler::zero, done); | |
| 823 | |
| 824 // Atomic swap back the old header | |
| 825 if (os::is_MP()) lock(); | |
| 304 | 826 cmpxchgptr(header_reg, Address(obj_reg, 0)); |
| 0 | 827 |
| 828 // zero for recursive case | |
| 829 jcc(Assembler::zero, done); | |
| 830 | |
| 831 // Call the runtime routine for slow case. | |
| 304 | 832 movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), |
| 0 | 833 obj_reg); // restore obj |
| 834 call_VM(noreg, | |
| 835 CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), | |
| 836 lock_reg); | |
| 837 | |
| 838 bind(done); | |
| 839 | |
| 840 restore_bcp(); | |
| 841 } | |
| 842 } | |
| 843 | |
| 304 | 844 #ifndef CC_INTERP |
| 0 | 845 |
| 846 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp, | |
| 847 Label& zero_continue) { | |
| 848 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 304 | 849 movptr(mdp, Address(rbp, frame::interpreter_frame_mdx_offset * wordSize)); |
| 850 testptr(mdp, mdp); | |
| 0 | 851 jcc(Assembler::zero, zero_continue); |
| 852 } | |
| 853 | |
| 854 | |
| 855 // Set the method data pointer for the current bcp. | |
| 856 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { | |
| 857 assert(ProfileInterpreter, "must be profiling interpreter"); | |
|
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858 Label set_mdp; |
| 304 | 859 push(rax); |
| 860 push(rbx); | |
| 0 | 861 |
| 862 get_method(rbx); | |
| 863 // Test MDO to avoid the call if it is NULL. | |
| 304 | 864 movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
| 865 testptr(rax, rax); | |
|
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866 jcc(Assembler::zero, set_mdp); |
| 0 | 867 // rbx: method |
| 868 // r13: bcp | |
| 869 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, r13); | |
| 870 // rax: mdi | |
|
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871 // mdo is guaranteed to be non-zero here, we checked for it before the call. |
| 304 | 872 movptr(rbx, Address(rbx, in_bytes(methodOopDesc::method_data_offset()))); |
| 873 addptr(rbx, in_bytes(methodDataOopDesc::data_offset())); | |
|
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874 addptr(rax, rbx); |
|
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875 bind(set_mdp); |
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876 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax); |
| 304 | 877 pop(rbx); |
| 878 pop(rax); | |
| 0 | 879 } |
| 880 | |
| 881 void InterpreterMacroAssembler::verify_method_data_pointer() { | |
| 882 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 883 #ifdef ASSERT | |
| 884 Label verify_continue; | |
| 304 | 885 push(rax); |
| 886 push(rbx); | |
| 887 push(c_rarg3); | |
| 888 push(c_rarg2); | |
| 0 | 889 test_method_data_pointer(c_rarg3, verify_continue); // If mdp is zero, continue |
| 890 get_method(rbx); | |
| 891 | |
| 892 // If the mdp is valid, it will point to a DataLayout header which is | |
| 893 // consistent with the bcp. The converse is highly probable also. | |
|
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894 load_unsigned_short(c_rarg2, |
|
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|
895 Address(c_rarg3, in_bytes(DataLayout::bci_offset()))); |
| 304 | 896 addptr(c_rarg2, Address(rbx, methodOopDesc::const_offset())); |
| 897 lea(c_rarg2, Address(c_rarg2, constMethodOopDesc::codes_offset())); | |
| 898 cmpptr(c_rarg2, r13); | |
| 0 | 899 jcc(Assembler::equal, verify_continue); |
| 900 // rbx: method | |
| 901 // r13: bcp | |
| 902 // c_rarg3: mdp | |
| 903 call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), | |
| 904 rbx, r13, c_rarg3); | |
| 905 bind(verify_continue); | |
| 304 | 906 pop(c_rarg2); |
| 907 pop(c_rarg3); | |
| 908 pop(rbx); | |
| 909 pop(rax); | |
| 0 | 910 #endif // ASSERT |
| 911 } | |
| 912 | |
| 913 | |
| 914 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in, | |
| 915 int constant, | |
| 916 Register value) { | |
| 917 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 918 Address data(mdp_in, constant); | |
| 304 | 919 movptr(data, value); |
| 0 | 920 } |
| 921 | |
| 922 | |
| 923 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
| 924 int constant, | |
| 925 bool decrement) { | |
| 926 // Counter address | |
| 927 Address data(mdp_in, constant); | |
| 928 | |
| 929 increment_mdp_data_at(data, decrement); | |
| 930 } | |
| 931 | |
| 932 void InterpreterMacroAssembler::increment_mdp_data_at(Address data, | |
| 933 bool decrement) { | |
| 934 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 304 | 935 // %%% this does 64bit counters at best it is wasting space |
| 936 // at worst it is a rare bug when counters overflow | |
| 0 | 937 |
| 938 if (decrement) { | |
| 939 // Decrement the register. Set condition codes. | |
| 304 | 940 addptr(data, (int32_t) -DataLayout::counter_increment); |
| 0 | 941 // If the decrement causes the counter to overflow, stay negative |
| 942 Label L; | |
| 943 jcc(Assembler::negative, L); | |
| 304 | 944 addptr(data, (int32_t) DataLayout::counter_increment); |
| 0 | 945 bind(L); |
| 946 } else { | |
| 947 assert(DataLayout::counter_increment == 1, | |
| 948 "flow-free idiom only works with 1"); | |
| 949 // Increment the register. Set carry flag. | |
| 304 | 950 addptr(data, DataLayout::counter_increment); |
| 0 | 951 // If the increment causes the counter to overflow, pull back by 1. |
| 304 | 952 sbbptr(data, (int32_t)0); |
| 0 | 953 } |
| 954 } | |
| 955 | |
| 956 | |
| 957 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in, | |
| 958 Register reg, | |
| 959 int constant, | |
| 960 bool decrement) { | |
| 961 Address data(mdp_in, reg, Address::times_1, constant); | |
| 962 | |
| 963 increment_mdp_data_at(data, decrement); | |
| 964 } | |
| 965 | |
| 966 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in, | |
| 967 int flag_byte_constant) { | |
| 968 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 969 int header_offset = in_bytes(DataLayout::header_offset()); | |
| 970 int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant); | |
| 971 // Set the flag | |
| 972 orl(Address(mdp_in, header_offset), header_bits); | |
| 973 } | |
| 974 | |
| 975 | |
| 976 | |
| 977 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in, | |
| 978 int offset, | |
| 979 Register value, | |
| 980 Register test_value_out, | |
| 981 Label& not_equal_continue) { | |
| 982 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 983 if (test_value_out == noreg) { | |
| 304 | 984 cmpptr(value, Address(mdp_in, offset)); |
| 0 | 985 } else { |
| 986 // Put the test value into a register, so caller can use it: | |
| 304 | 987 movptr(test_value_out, Address(mdp_in, offset)); |
| 988 cmpptr(test_value_out, value); | |
| 0 | 989 } |
| 990 jcc(Assembler::notEqual, not_equal_continue); | |
| 991 } | |
| 992 | |
| 993 | |
| 994 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
| 995 int offset_of_disp) { | |
| 996 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 997 Address disp_address(mdp_in, offset_of_disp); | |
| 304 | 998 addptr(mdp_in, disp_address); |
| 999 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
| 0 | 1000 } |
| 1001 | |
| 1002 | |
| 1003 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in, | |
| 1004 Register reg, | |
| 1005 int offset_of_disp) { | |
| 1006 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 1007 Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp); | |
| 304 | 1008 addptr(mdp_in, disp_address); |
| 1009 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
| 0 | 1010 } |
| 1011 | |
| 1012 | |
| 1013 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in, | |
| 1014 int constant) { | |
| 1015 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 304 | 1016 addptr(mdp_in, constant); |
| 1017 movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp_in); | |
| 0 | 1018 } |
| 1019 | |
| 1020 | |
| 1021 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) { | |
| 1022 assert(ProfileInterpreter, "must be profiling interpreter"); | |
| 304 | 1023 push(return_bci); // save/restore across call_VM |
| 0 | 1024 call_VM(noreg, |
| 1025 CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), | |
| 1026 return_bci); | |
| 304 | 1027 pop(return_bci); |
| 0 | 1028 } |
| 1029 | |
| 1030 | |
| 1031 void InterpreterMacroAssembler::profile_taken_branch(Register mdp, | |
| 1032 Register bumped_count) { | |
| 1033 if (ProfileInterpreter) { | |
| 1034 Label profile_continue; | |
| 1035 | |
| 1036 // If no method data exists, go to profile_continue. | |
| 1037 // Otherwise, assign to mdp | |
| 1038 test_method_data_pointer(mdp, profile_continue); | |
| 1039 | |
| 1040 // We are taking a branch. Increment the taken count. | |
| 1041 // We inline increment_mdp_data_at to return bumped_count in a register | |
| 1042 //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset())); | |
| 1043 Address data(mdp, in_bytes(JumpData::taken_offset())); | |
| 304 | 1044 movptr(bumped_count, data); |
| 0 | 1045 assert(DataLayout::counter_increment == 1, |
| 1046 "flow-free idiom only works with 1"); | |
| 304 | 1047 addptr(bumped_count, DataLayout::counter_increment); |
| 1048 sbbptr(bumped_count, 0); | |
| 1049 movptr(data, bumped_count); // Store back out | |
| 0 | 1050 |
| 1051 // The method data pointer needs to be updated to reflect the new target. | |
| 1052 update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset())); | |
| 1053 bind(profile_continue); | |
| 1054 } | |
| 1055 } | |
| 1056 | |
| 1057 | |
| 1058 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) { | |
| 1059 if (ProfileInterpreter) { | |
| 1060 Label profile_continue; | |
| 1061 | |
| 1062 // If no method data exists, go to profile_continue. | |
| 1063 test_method_data_pointer(mdp, profile_continue); | |
| 1064 | |
| 1065 // We are taking a branch. Increment the not taken count. | |
| 1066 increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset())); | |
| 1067 | |
| 1068 // The method data pointer needs to be updated to correspond to | |
| 1069 // the next bytecode | |
| 1070 update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size())); | |
| 1071 bind(profile_continue); | |
| 1072 } | |
| 1073 } | |
| 1074 | |
| 1075 | |
| 1076 void InterpreterMacroAssembler::profile_call(Register mdp) { | |
| 1077 if (ProfileInterpreter) { | |
| 1078 Label profile_continue; | |
| 1079 | |
| 1080 // If no method data exists, go to profile_continue. | |
| 1081 test_method_data_pointer(mdp, profile_continue); | |
| 1082 | |
| 1083 // We are making a call. Increment the count. | |
| 1084 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
| 1085 | |
| 1086 // The method data pointer needs to be updated to reflect the new target. | |
| 1087 update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size())); | |
| 1088 bind(profile_continue); | |
| 1089 } | |
| 1090 } | |
| 1091 | |
| 1092 | |
| 1093 void InterpreterMacroAssembler::profile_final_call(Register mdp) { | |
| 1094 if (ProfileInterpreter) { | |
| 1095 Label profile_continue; | |
| 1096 | |
| 1097 // If no method data exists, go to profile_continue. | |
| 1098 test_method_data_pointer(mdp, profile_continue); | |
| 1099 | |
| 1100 // We are making a call. Increment the count. | |
| 1101 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
| 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 | |
| 1112 void InterpreterMacroAssembler::profile_virtual_call(Register receiver, | |
| 1113 Register mdp, | |
| 1108 | 1114 Register reg2, |
| 1115 bool receiver_can_be_null) { | |
| 0 | 1116 if (ProfileInterpreter) { |
| 1117 Label profile_continue; | |
| 1118 | |
| 1119 // If no method data exists, go to profile_continue. | |
| 1120 test_method_data_pointer(mdp, profile_continue); | |
| 1121 | |
| 1108 | 1122 Label skip_receiver_profile; |
| 1123 if (receiver_can_be_null) { | |
|
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1124 Label not_null; |
| 1108 | 1125 testptr(receiver, receiver); |
|
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1126 jccb(Assembler::notZero, not_null); |
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1127 // We are making a call. Increment the count for null receiver. |
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1128 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1129 jmp(skip_receiver_profile); |
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1130 bind(not_null); |
| 1108 | 1131 } |
| 1132 | |
| 0 | 1133 // Record the receiver type. |
|
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1134 record_klass_in_profile(receiver, mdp, reg2, true); |
| 1108 | 1135 bind(skip_receiver_profile); |
| 0 | 1136 |
| 1137 // The method data pointer needs to be updated to reflect the new target. | |
| 1138 update_mdp_by_constant(mdp, | |
| 1139 in_bytes(VirtualCallData:: | |
| 1140 virtual_call_data_size())); | |
| 1141 bind(profile_continue); | |
| 1142 } | |
| 1143 } | |
| 1144 | |
| 1145 // This routine creates a state machine for updating the multi-row | |
| 1146 // type profile at a virtual call site (or other type-sensitive bytecode). | |
| 1147 // The machine visits each row (of receiver/count) until the receiver type | |
| 1148 // is found, or until it runs out of rows. At the same time, it remembers | |
| 1149 // the location of the first empty row. (An empty row records null for its | |
| 1150 // receiver, and can be allocated for a newly-observed receiver type.) | |
| 1151 // Because there are two degrees of freedom in the state, a simple linear | |
| 1152 // search will not work; it must be a decision tree. Hence this helper | |
| 1153 // function is recursive, to generate the required tree structured code. | |
| 1154 // It's the interpreter, so we are trading off code space for speed. | |
| 1155 // See below for example code. | |
| 1156 void InterpreterMacroAssembler::record_klass_in_profile_helper( | |
| 1157 Register receiver, Register mdp, | |
|
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1158 Register reg2, int start_row, |
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1159 Label& done, bool is_virtual_call) { |
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1160 if (TypeProfileWidth == 0) { |
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1161 if (is_virtual_call) { |
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1162 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1163 } |
|
967
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1164 return; |
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1165 } |
|
967
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1166 |
| 0 | 1167 int last_row = VirtualCallData::row_limit() - 1; |
| 1168 assert(start_row <= last_row, "must be work left to do"); | |
| 1169 // Test this row for both the receiver and for null. | |
| 1170 // Take any of three different outcomes: | |
| 1171 // 1. found receiver => increment count and goto done | |
| 1172 // 2. found null => keep looking for case 1, maybe allocate this cell | |
| 1173 // 3. found something else => keep looking for cases 1 and 2 | |
| 1174 // Case 3 is handled by a recursive call. | |
| 1175 for (int row = start_row; row <= last_row; row++) { | |
| 1176 Label next_test; | |
| 1177 bool test_for_null_also = (row == start_row); | |
| 1178 | |
| 1179 // See if the receiver is receiver[n]. | |
| 1180 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); | |
| 1181 test_mdp_data_at(mdp, recvr_offset, receiver, | |
| 1182 (test_for_null_also ? reg2 : noreg), | |
| 1183 next_test); | |
| 1184 // (Reg2 now contains the receiver from the CallData.) | |
| 1185 | |
| 1186 // The receiver is receiver[n]. Increment count[n]. | |
| 1187 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); | |
| 1188 increment_mdp_data_at(mdp, count_offset); | |
| 1189 jmp(done); | |
| 1190 bind(next_test); | |
| 1191 | |
| 1192 if (test_for_null_also) { | |
|
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1193 Label found_null; |
| 0 | 1194 // Failed the equality check on receiver[n]... Test for null. |
| 304 | 1195 testptr(reg2, reg2); |
| 0 | 1196 if (start_row == last_row) { |
| 1197 // The only thing left to do is handle the null case. | |
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1198 if (is_virtual_call) { |
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1199 jccb(Assembler::zero, found_null); |
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1200 // Receiver did not match any saved receiver and there is no empty row for it. |
|
1251
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1201 // Increment total counter to indicate polymorphic case. |
|
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1202 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); |
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1203 jmp(done); |
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1204 bind(found_null); |
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1205 } else { |
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1206 jcc(Assembler::notZero, done); |
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1207 } |
| 0 | 1208 break; |
| 1209 } | |
| 1210 // Since null is rare, make it be the branch-taken case. | |
| 1211 jcc(Assembler::zero, found_null); | |
| 1212 | |
| 1213 // Put all the "Case 3" tests here. | |
|
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1214 record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call); |
| 0 | 1215 |
| 1216 // Found a null. Keep searching for a matching receiver, | |
| 1217 // but remember that this is an empty (unused) slot. | |
| 1218 bind(found_null); | |
| 1219 } | |
| 1220 } | |
| 1221 | |
| 1222 // In the fall-through case, we found no matching receiver, but we | |
| 1223 // observed the receiver[start_row] is NULL. | |
| 1224 | |
| 1225 // Fill in the receiver field and increment the count. | |
| 1226 int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); | |
| 1227 set_mdp_data_at(mdp, recvr_offset, receiver); | |
| 1228 int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); | |
| 1229 movl(reg2, DataLayout::counter_increment); | |
| 1230 set_mdp_data_at(mdp, count_offset, reg2); | |
|
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1231 if (start_row > 0) { |
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1232 jmp(done); |
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1233 } |
| 0 | 1234 } |
| 1235 | |
| 1236 // Example state machine code for three profile rows: | |
| 1237 // // main copy of decision tree, rooted at row[1] | |
| 1238 // if (row[0].rec == rec) { row[0].incr(); goto done; } | |
| 1239 // if (row[0].rec != NULL) { | |
| 1240 // // inner copy of decision tree, rooted at row[1] | |
| 1241 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
| 1242 // if (row[1].rec != NULL) { | |
| 1243 // // degenerate decision tree, rooted at row[2] | |
| 1244 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
|
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1245 // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow |
| 0 | 1246 // row[2].init(rec); goto done; |
| 1247 // } else { | |
| 1248 // // remember row[1] is empty | |
| 1249 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
| 1250 // row[1].init(rec); goto done; | |
| 1251 // } | |
| 1252 // } else { | |
| 1253 // // remember row[0] is empty | |
| 1254 // if (row[1].rec == rec) { row[1].incr(); goto done; } | |
| 1255 // if (row[2].rec == rec) { row[2].incr(); goto done; } | |
| 1256 // row[0].init(rec); goto done; | |
| 1257 // } | |
|
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1258 // done: |
| 0 | 1259 |
| 1260 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver, | |
|
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1261 Register mdp, Register reg2, |
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1262 bool is_virtual_call) { |
| 0 | 1263 assert(ProfileInterpreter, "must be profiling"); |
| 1264 Label done; | |
| 1265 | |
|
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1266 record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call); |
| 0 | 1267 |
| 1268 bind (done); | |
| 1269 } | |
| 1270 | |
| 1271 void InterpreterMacroAssembler::profile_ret(Register return_bci, | |
| 1272 Register mdp) { | |
| 1273 if (ProfileInterpreter) { | |
| 1274 Label profile_continue; | |
| 1275 uint row; | |
| 1276 | |
| 1277 // If no method data exists, go to profile_continue. | |
| 1278 test_method_data_pointer(mdp, profile_continue); | |
| 1279 | |
| 1280 // Update the total ret count. | |
| 1281 increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset())); | |
| 1282 | |
| 1283 for (row = 0; row < RetData::row_limit(); row++) { | |
| 1284 Label next_test; | |
| 1285 | |
| 1286 // See if return_bci is equal to bci[n]: | |
| 1287 test_mdp_data_at(mdp, | |
| 1288 in_bytes(RetData::bci_offset(row)), | |
| 1289 return_bci, noreg, | |
| 1290 next_test); | |
| 1291 | |
| 1292 // return_bci is equal to bci[n]. Increment the count. | |
| 1293 increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row))); | |
| 1294 | |
| 1295 // The method data pointer needs to be updated to reflect the new target. | |
| 1296 update_mdp_by_offset(mdp, | |
| 1297 in_bytes(RetData::bci_displacement_offset(row))); | |
| 1298 jmp(profile_continue); | |
| 1299 bind(next_test); | |
| 1300 } | |
| 1301 | |
| 1302 update_mdp_for_ret(return_bci); | |
| 1303 | |
| 1304 bind(profile_continue); | |
| 1305 } | |
| 1306 } | |
| 1307 | |
| 1308 | |
| 1309 void InterpreterMacroAssembler::profile_null_seen(Register mdp) { | |
| 1310 if (ProfileInterpreter) { | |
| 1311 Label profile_continue; | |
| 1312 | |
| 1313 // If no method data exists, go to profile_continue. | |
| 1314 test_method_data_pointer(mdp, profile_continue); | |
| 1315 | |
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1316 set_mdp_flag_at(mdp, BitData::null_seen_byte_constant()); |
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1317 |
| 0 | 1318 // The method data pointer needs to be updated. |
| 1319 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
| 1320 if (TypeProfileCasts) { | |
| 1321 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
| 1322 } | |
| 1323 update_mdp_by_constant(mdp, mdp_delta); | |
| 1324 | |
| 1325 bind(profile_continue); | |
| 1326 } | |
| 1327 } | |
| 1328 | |
| 1329 | |
| 1330 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) { | |
| 1331 if (ProfileInterpreter && TypeProfileCasts) { | |
| 1332 Label profile_continue; | |
| 1333 | |
| 1334 // If no method data exists, go to profile_continue. | |
| 1335 test_method_data_pointer(mdp, profile_continue); | |
| 1336 | |
| 1337 int count_offset = in_bytes(CounterData::count_offset()); | |
| 1338 // Back up the address, since we have already bumped the mdp. | |
| 1339 count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); | |
| 1340 | |
| 1341 // *Decrement* the counter. We expect to see zero or small negatives. | |
| 1342 increment_mdp_data_at(mdp, count_offset, true); | |
| 1343 | |
| 1344 bind (profile_continue); | |
| 1345 } | |
| 1346 } | |
| 1347 | |
| 1348 | |
| 1349 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) { | |
| 1350 if (ProfileInterpreter) { | |
| 1351 Label profile_continue; | |
| 1352 | |
| 1353 // If no method data exists, go to profile_continue. | |
| 1354 test_method_data_pointer(mdp, profile_continue); | |
| 1355 | |
| 1356 // The method data pointer needs to be updated. | |
| 1357 int mdp_delta = in_bytes(BitData::bit_data_size()); | |
| 1358 if (TypeProfileCasts) { | |
| 1359 mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); | |
| 1360 | |
| 1361 // Record the object type. | |
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1362 record_klass_in_profile(klass, mdp, reg2, false); |
| 0 | 1363 } |
| 1364 update_mdp_by_constant(mdp, mdp_delta); | |
| 1365 | |
| 1366 bind(profile_continue); | |
| 1367 } | |
| 1368 } | |
| 1369 | |
| 1370 | |
| 1371 void InterpreterMacroAssembler::profile_switch_default(Register mdp) { | |
| 1372 if (ProfileInterpreter) { | |
| 1373 Label profile_continue; | |
| 1374 | |
| 1375 // If no method data exists, go to profile_continue. | |
| 1376 test_method_data_pointer(mdp, profile_continue); | |
| 1377 | |
| 1378 // Update the default case count | |
| 1379 increment_mdp_data_at(mdp, | |
| 1380 in_bytes(MultiBranchData::default_count_offset())); | |
| 1381 | |
| 1382 // The method data pointer needs to be updated. | |
| 1383 update_mdp_by_offset(mdp, | |
| 1384 in_bytes(MultiBranchData:: | |
| 1385 default_displacement_offset())); | |
| 1386 | |
| 1387 bind(profile_continue); | |
| 1388 } | |
| 1389 } | |
| 1390 | |
| 1391 | |
| 1392 void InterpreterMacroAssembler::profile_switch_case(Register index, | |
| 1393 Register mdp, | |
| 1394 Register reg2) { | |
| 1395 if (ProfileInterpreter) { | |
| 1396 Label profile_continue; | |
| 1397 | |
| 1398 // If no method data exists, go to profile_continue. | |
| 1399 test_method_data_pointer(mdp, profile_continue); | |
| 1400 | |
| 1401 // Build the base (index * per_case_size_in_bytes()) + | |
| 1402 // case_array_offset_in_bytes() | |
| 1403 movl(reg2, in_bytes(MultiBranchData::per_case_size())); | |
| 304 | 1404 imulptr(index, reg2); // XXX l ? |
| 1405 addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ? | |
| 0 | 1406 |
| 1407 // Update the case count | |
| 1408 increment_mdp_data_at(mdp, | |
| 1409 index, | |
| 1410 in_bytes(MultiBranchData::relative_count_offset())); | |
| 1411 | |
| 1412 // The method data pointer needs to be updated. | |
| 1413 update_mdp_by_offset(mdp, | |
| 1414 index, | |
| 1415 in_bytes(MultiBranchData:: | |
| 1416 relative_displacement_offset())); | |
| 1417 | |
| 1418 bind(profile_continue); | |
| 1419 } | |
| 1420 } | |
| 1421 | |
| 1422 | |
| 304 | 1423 |
| 0 | 1424 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
| 1425 if (state == atos) { | |
| 1426 MacroAssembler::verify_oop(reg); | |
| 1427 } | |
| 1428 } | |
| 1429 | |
| 1430 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { | |
| 1431 } | |
| 304 | 1432 #endif // !CC_INTERP |
| 0 | 1433 |
| 1434 | |
| 1435 void InterpreterMacroAssembler::notify_method_entry() { | |
| 1436 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
| 1437 // track stack depth. If it is possible to enter interp_only_mode we add | |
| 1438 // the code to check if the event should be sent. | |
| 1439 if (JvmtiExport::can_post_interpreter_events()) { | |
| 1440 Label L; | |
| 1441 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); | |
| 1442 testl(rdx, rdx); | |
| 1443 jcc(Assembler::zero, L); | |
| 1444 call_VM(noreg, CAST_FROM_FN_PTR(address, | |
| 1445 InterpreterRuntime::post_method_entry)); | |
| 1446 bind(L); | |
| 1447 } | |
| 1448 | |
| 1449 { | |
| 1450 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
| 1451 get_method(c_rarg1); | |
| 1452 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
| 1453 r15_thread, c_rarg1); | |
| 1454 } | |
|
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1455 |
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1456 // RedefineClasses() tracing support for obsolete method entry |
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1457 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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1458 get_method(c_rarg1); |
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1459 call_VM_leaf( |
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1460 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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1461 r15_thread, c_rarg1); |
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1462 } |
| 0 | 1463 } |
| 1464 | |
| 1465 | |
| 1466 void InterpreterMacroAssembler::notify_method_exit( | |
| 1467 TosState state, NotifyMethodExitMode mode) { | |
| 1468 // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to | |
| 1469 // track stack depth. If it is possible to enter interp_only_mode we add | |
| 1470 // the code to check if the event should be sent. | |
| 1471 if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { | |
| 1472 Label L; | |
| 1473 // Note: frame::interpreter_frame_result has a dependency on how the | |
| 1474 // method result is saved across the call to post_method_exit. If this | |
| 1475 // is changed then the interpreter_frame_result implementation will | |
| 1476 // need to be updated too. | |
| 304 | 1477 |
| 1478 // For c++ interpreter the result is always stored at a known location in the frame | |
| 1479 // template interpreter will leave it on the top of the stack. | |
| 1480 NOT_CC_INTERP(push(state);) | |
| 0 | 1481 movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset())); |
| 1482 testl(rdx, rdx); | |
| 1483 jcc(Assembler::zero, L); | |
| 1484 call_VM(noreg, | |
| 1485 CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit)); | |
| 1486 bind(L); | |
| 304 | 1487 NOT_CC_INTERP(pop(state)); |
| 0 | 1488 } |
| 1489 | |
| 1490 { | |
| 1491 SkipIfEqual skip(this, &DTraceMethodProbes, false); | |
| 304 | 1492 NOT_CC_INTERP(push(state)); |
| 0 | 1493 get_method(c_rarg1); |
| 1494 call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
| 1495 r15_thread, c_rarg1); | |
| 304 | 1496 NOT_CC_INTERP(pop(state)); |
| 0 | 1497 } |
| 1498 } | |
| 1783 | 1499 |
| 1500 // Jump if ((*counter_addr += increment) & mask) satisfies the condition. | |
| 1501 void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr, | |
| 1502 int increment, int mask, | |
| 1503 Register scratch, bool preloaded, | |
| 1504 Condition cond, Label* where) { | |
| 1505 if (!preloaded) { | |
| 1506 movl(scratch, counter_addr); | |
| 1507 } | |
| 1508 incrementl(scratch, increment); | |
| 1509 movl(counter_addr, scratch); | |
| 1510 andl(scratch, mask); | |
| 1511 jcc(cond, *where); | |
| 1512 } |