Mercurial > hg > truffle
annotate src/cpu/x86/vm/cppInterpreter_x86.cpp @ 7212:291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Fri, 14 Dec 2012 14:35:13 +0100 |
| parents | d2f8c38e543d |
| children | fd74228fd5ca |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
| 1972 | 27 #include "interpreter/bytecodeHistogram.hpp" |
| 28 #include "interpreter/cppInterpreter.hpp" | |
| 29 #include "interpreter/interpreter.hpp" | |
| 30 #include "interpreter/interpreterGenerator.hpp" | |
| 31 #include "interpreter/interpreterRuntime.hpp" | |
| 32 #include "oops/arrayOop.hpp" | |
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33 #include "oops/methodData.hpp" |
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34 #include "oops/method.hpp" |
| 1972 | 35 #include "oops/oop.inline.hpp" |
| 36 #include "prims/jvmtiExport.hpp" | |
| 37 #include "prims/jvmtiThreadState.hpp" | |
| 38 #include "runtime/arguments.hpp" | |
| 39 #include "runtime/deoptimization.hpp" | |
| 40 #include "runtime/frame.inline.hpp" | |
| 41 #include "runtime/interfaceSupport.hpp" | |
| 42 #include "runtime/sharedRuntime.hpp" | |
| 43 #include "runtime/stubRoutines.hpp" | |
| 44 #include "runtime/synchronizer.hpp" | |
| 45 #include "runtime/timer.hpp" | |
| 46 #include "runtime/vframeArray.hpp" | |
| 47 #include "utilities/debug.hpp" | |
| 48 #ifdef SHARK | |
| 49 #include "shark/shark_globals.hpp" | |
| 50 #endif | |
| 0 | 51 |
| 52 #ifdef CC_INTERP | |
| 53 | |
| 54 // Routine exists to make tracebacks look decent in debugger | |
| 55 // while we are recursed in the frame manager/c++ interpreter. | |
| 56 // We could use an address in the frame manager but having | |
| 57 // frames look natural in the debugger is a plus. | |
| 58 extern "C" void RecursiveInterpreterActivation(interpreterState istate ) | |
| 59 { | |
| 60 // | |
| 61 ShouldNotReachHere(); | |
| 62 } | |
| 63 | |
| 64 | |
| 65 #define __ _masm-> | |
| 66 #define STATE(field_name) (Address(state, byte_offset_of(BytecodeInterpreter, field_name))) | |
| 67 | |
| 68 Label fast_accessor_slow_entry_path; // fast accessor methods need to be able to jmp to unsynchronized | |
| 69 // c++ interpreter entry point this holds that entry point label. | |
| 70 | |
| 304 | 71 // default registers for state and sender_sp |
| 72 // state and sender_sp are the same on 32bit because we have no choice. | |
| 73 // state could be rsi on 64bit but it is an arg reg and not callee save | |
| 74 // so r13 is better choice. | |
| 75 | |
| 76 const Register state = NOT_LP64(rsi) LP64_ONLY(r13); | |
| 77 const Register sender_sp_on_entry = NOT_LP64(rsi) LP64_ONLY(r13); | |
| 78 | |
| 0 | 79 // NEEDED for JVMTI? |
| 80 // address AbstractInterpreter::_remove_activation_preserving_args_entry; | |
| 81 | |
| 82 static address unctrap_frame_manager_entry = NULL; | |
| 83 | |
| 84 static address deopt_frame_manager_return_atos = NULL; | |
| 85 static address deopt_frame_manager_return_btos = NULL; | |
| 86 static address deopt_frame_manager_return_itos = NULL; | |
| 87 static address deopt_frame_manager_return_ltos = NULL; | |
| 88 static address deopt_frame_manager_return_ftos = NULL; | |
| 89 static address deopt_frame_manager_return_dtos = NULL; | |
| 90 static address deopt_frame_manager_return_vtos = NULL; | |
| 91 | |
| 92 int AbstractInterpreter::BasicType_as_index(BasicType type) { | |
| 93 int i = 0; | |
| 94 switch (type) { | |
| 95 case T_BOOLEAN: i = 0; break; | |
| 96 case T_CHAR : i = 1; break; | |
| 97 case T_BYTE : i = 2; break; | |
| 98 case T_SHORT : i = 3; break; | |
| 99 case T_INT : i = 4; break; | |
| 100 case T_VOID : i = 5; break; | |
| 101 case T_FLOAT : i = 8; break; | |
| 102 case T_LONG : i = 9; break; | |
| 103 case T_DOUBLE : i = 6; break; | |
| 104 case T_OBJECT : // fall through | |
| 105 case T_ARRAY : i = 7; break; | |
| 106 default : ShouldNotReachHere(); | |
| 107 } | |
| 108 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); | |
| 109 return i; | |
| 110 } | |
| 111 | |
| 112 // Is this pc anywhere within code owned by the interpreter? | |
| 113 // This only works for pc that might possibly be exposed to frame | |
| 114 // walkers. It clearly misses all of the actual c++ interpreter | |
| 115 // implementation | |
| 116 bool CppInterpreter::contains(address pc) { | |
| 117 return (_code->contains(pc) || | |
| 118 pc == CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation)); | |
| 119 } | |
| 120 | |
| 121 | |
| 122 address CppInterpreterGenerator::generate_result_handler_for(BasicType type) { | |
| 123 address entry = __ pc(); | |
| 124 switch (type) { | |
| 125 case T_BOOLEAN: __ c2bool(rax); break; | |
| 126 case T_CHAR : __ andl(rax, 0xFFFF); break; | |
| 127 case T_BYTE : __ sign_extend_byte (rax); break; | |
| 128 case T_SHORT : __ sign_extend_short(rax); break; | |
| 129 case T_VOID : // fall thru | |
| 130 case T_LONG : // fall thru | |
| 131 case T_INT : /* nothing to do */ break; | |
| 304 | 132 |
| 0 | 133 case T_DOUBLE : |
| 134 case T_FLOAT : | |
| 304 | 135 { |
| 136 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
| 137 __ pop(t); // remove return address first | |
| 0 | 138 // Must return a result for interpreter or compiler. In SSE |
| 139 // mode, results are returned in xmm0 and the FPU stack must | |
| 140 // be empty. | |
| 141 if (type == T_FLOAT && UseSSE >= 1) { | |
| 304 | 142 #ifndef _LP64 |
| 0 | 143 // Load ST0 |
| 144 __ fld_d(Address(rsp, 0)); | |
| 145 // Store as float and empty fpu stack | |
| 146 __ fstp_s(Address(rsp, 0)); | |
| 304 | 147 #endif // !_LP64 |
| 0 | 148 // and reload |
| 149 __ movflt(xmm0, Address(rsp, 0)); | |
| 150 } else if (type == T_DOUBLE && UseSSE >= 2 ) { | |
| 151 __ movdbl(xmm0, Address(rsp, 0)); | |
| 152 } else { | |
| 153 // restore ST0 | |
| 154 __ fld_d(Address(rsp, 0)); | |
| 155 } | |
| 156 // and pop the temp | |
| 304 | 157 __ addptr(rsp, 2 * wordSize); |
| 158 __ push(t); // restore return address | |
| 0 | 159 } |
| 160 break; | |
| 161 case T_OBJECT : | |
| 162 // retrieve result from frame | |
| 304 | 163 __ movptr(rax, STATE(_oop_temp)); |
| 0 | 164 // and verify it |
| 165 __ verify_oop(rax); | |
| 166 break; | |
| 167 default : ShouldNotReachHere(); | |
| 168 } | |
| 169 __ ret(0); // return from result handler | |
| 170 return entry; | |
| 171 } | |
| 172 | |
| 173 // tosca based result to c++ interpreter stack based result. | |
| 174 // Result goes to top of native stack. | |
| 175 | |
| 176 #undef EXTEND // SHOULD NOT BE NEEDED | |
| 177 address CppInterpreterGenerator::generate_tosca_to_stack_converter(BasicType type) { | |
| 178 // A result is in the tosca (abi result) from either a native method call or compiled | |
| 179 // code. Place this result on the java expression stack so C++ interpreter can use it. | |
| 180 address entry = __ pc(); | |
| 181 | |
| 182 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
| 304 | 183 __ pop(t); // remove return address first |
| 0 | 184 switch (type) { |
| 185 case T_VOID: | |
| 186 break; | |
| 187 case T_BOOLEAN: | |
| 188 #ifdef EXTEND | |
| 189 __ c2bool(rax); | |
| 190 #endif | |
| 304 | 191 __ push(rax); |
| 0 | 192 break; |
| 193 case T_CHAR : | |
| 194 #ifdef EXTEND | |
| 195 __ andl(rax, 0xFFFF); | |
| 196 #endif | |
| 304 | 197 __ push(rax); |
| 0 | 198 break; |
| 199 case T_BYTE : | |
| 200 #ifdef EXTEND | |
| 201 __ sign_extend_byte (rax); | |
| 202 #endif | |
| 304 | 203 __ push(rax); |
| 0 | 204 break; |
| 205 case T_SHORT : | |
| 206 #ifdef EXTEND | |
| 207 __ sign_extend_short(rax); | |
| 208 #endif | |
| 304 | 209 __ push(rax); |
| 0 | 210 break; |
| 211 case T_LONG : | |
| 304 | 212 __ push(rdx); // pushes useless junk on 64bit |
| 213 __ push(rax); | |
| 0 | 214 break; |
| 215 case T_INT : | |
| 304 | 216 __ push(rax); |
| 0 | 217 break; |
| 218 case T_FLOAT : | |
| 304 | 219 // Result is in ST(0)/xmm0 |
| 220 __ subptr(rsp, wordSize); | |
| 0 | 221 if ( UseSSE < 1) { |
| 304 | 222 __ fstp_s(Address(rsp, 0)); |
| 0 | 223 } else { |
| 224 __ movflt(Address(rsp, 0), xmm0); | |
| 225 } | |
| 226 break; | |
| 227 case T_DOUBLE : | |
| 304 | 228 __ subptr(rsp, 2*wordSize); |
| 0 | 229 if ( UseSSE < 2 ) { |
| 304 | 230 __ fstp_d(Address(rsp, 0)); |
| 0 | 231 } else { |
| 232 __ movdbl(Address(rsp, 0), xmm0); | |
| 233 } | |
| 234 break; | |
| 235 case T_OBJECT : | |
| 236 __ verify_oop(rax); // verify it | |
| 304 | 237 __ push(rax); |
| 0 | 238 break; |
| 239 default : ShouldNotReachHere(); | |
| 240 } | |
| 241 __ jmp(t); // return from result handler | |
| 242 return entry; | |
| 243 } | |
| 244 | |
| 245 address CppInterpreterGenerator::generate_stack_to_stack_converter(BasicType type) { | |
| 246 // A result is in the java expression stack of the interpreted method that has just | |
| 247 // returned. Place this result on the java expression stack of the caller. | |
| 248 // | |
| 304 | 249 // The current interpreter activation in rsi/r13 is for the method just returning its |
| 0 | 250 // result. So we know that the result of this method is on the top of the current |
| 251 // execution stack (which is pre-pushed) and will be return to the top of the caller | |
| 252 // stack. The top of the callers stack is the bottom of the locals of the current | |
| 253 // activation. | |
| 254 // Because of the way activation are managed by the frame manager the value of rsp is | |
| 255 // below both the stack top of the current activation and naturally the stack top | |
| 256 // of the calling activation. This enable this routine to leave the return address | |
| 257 // to the frame manager on the stack and do a vanilla return. | |
| 258 // | |
| 304 | 259 // On entry: rsi/r13 - interpreter state of activation returning a (potential) result |
| 260 // On Return: rsi/r13 - unchanged | |
| 0 | 261 // rax - new stack top for caller activation (i.e. activation in _prev_link) |
| 262 // | |
| 263 // Can destroy rdx, rcx. | |
| 264 // | |
| 265 | |
| 266 address entry = __ pc(); | |
| 267 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); | |
| 268 switch (type) { | |
| 269 case T_VOID: | |
| 304 | 270 __ movptr(rax, STATE(_locals)); // pop parameters get new stack value |
| 271 __ addptr(rax, wordSize); // account for prepush before we return | |
| 0 | 272 break; |
| 273 case T_FLOAT : | |
| 274 case T_BOOLEAN: | |
| 275 case T_CHAR : | |
| 276 case T_BYTE : | |
| 277 case T_SHORT : | |
| 278 case T_INT : | |
| 279 // 1 word result | |
| 304 | 280 __ movptr(rdx, STATE(_stack)); |
| 281 __ movptr(rax, STATE(_locals)); // address for result | |
| 0 | 282 __ movl(rdx, Address(rdx, wordSize)); // get result |
| 304 | 283 __ movptr(Address(rax, 0), rdx); // and store it |
| 0 | 284 break; |
| 285 case T_LONG : | |
| 286 case T_DOUBLE : | |
| 287 // return top two words on current expression stack to caller's expression stack | |
| 288 // The caller's expression stack is adjacent to the current frame manager's intepretState | |
| 289 // except we allocated one extra word for this intepretState so we won't overwrite it | |
| 290 // when we return a two word result. | |
| 291 | |
| 304 | 292 __ movptr(rax, STATE(_locals)); // address for result |
| 293 __ movptr(rcx, STATE(_stack)); | |
| 294 __ subptr(rax, wordSize); // need addition word besides locals[0] | |
| 295 __ movptr(rdx, Address(rcx, 2*wordSize)); // get result word (junk in 64bit) | |
| 296 __ movptr(Address(rax, wordSize), rdx); // and store it | |
| 297 __ movptr(rdx, Address(rcx, wordSize)); // get result word | |
| 298 __ movptr(Address(rax, 0), rdx); // and store it | |
| 0 | 299 break; |
| 300 case T_OBJECT : | |
| 304 | 301 __ movptr(rdx, STATE(_stack)); |
| 302 __ movptr(rax, STATE(_locals)); // address for result | |
| 303 __ movptr(rdx, Address(rdx, wordSize)); // get result | |
| 0 | 304 __ verify_oop(rdx); // verify it |
| 304 | 305 __ movptr(Address(rax, 0), rdx); // and store it |
| 0 | 306 break; |
| 307 default : ShouldNotReachHere(); | |
| 308 } | |
| 309 __ ret(0); | |
| 310 return entry; | |
| 311 } | |
| 312 | |
| 313 address CppInterpreterGenerator::generate_stack_to_native_abi_converter(BasicType type) { | |
| 314 // A result is in the java expression stack of the interpreted method that has just | |
| 315 // returned. Place this result in the native abi that the caller expects. | |
| 316 // | |
| 317 // Similar to generate_stack_to_stack_converter above. Called at a similar time from the | |
| 318 // frame manager execept in this situation the caller is native code (c1/c2/call_stub) | |
| 319 // and so rather than return result onto caller's java expression stack we return the | |
| 320 // result in the expected location based on the native abi. | |
| 304 | 321 // On entry: rsi/r13 - interpreter state of activation returning a (potential) result |
| 322 // On Return: rsi/r13 - unchanged | |
| 0 | 323 // Other registers changed [rax/rdx/ST(0) as needed for the result returned] |
| 324 | |
| 325 address entry = __ pc(); | |
| 326 switch (type) { | |
| 327 case T_VOID: | |
| 328 break; | |
| 329 case T_BOOLEAN: | |
| 330 case T_CHAR : | |
| 331 case T_BYTE : | |
| 332 case T_SHORT : | |
| 333 case T_INT : | |
| 304 | 334 __ movptr(rdx, STATE(_stack)); // get top of stack |
| 0 | 335 __ movl(rax, Address(rdx, wordSize)); // get result word 1 |
| 336 break; | |
| 337 case T_LONG : | |
| 304 | 338 __ movptr(rdx, STATE(_stack)); // get top of stack |
| 339 __ movptr(rax, Address(rdx, wordSize)); // get result low word | |
| 340 NOT_LP64(__ movl(rdx, Address(rdx, 2*wordSize));) // get result high word | |
| 0 | 341 break; |
| 342 case T_FLOAT : | |
| 304 | 343 __ movptr(rdx, STATE(_stack)); // get top of stack |
| 0 | 344 if ( UseSSE >= 1) { |
| 345 __ movflt(xmm0, Address(rdx, wordSize)); | |
| 346 } else { | |
| 347 __ fld_s(Address(rdx, wordSize)); // pushd float result | |
| 348 } | |
| 349 break; | |
| 350 case T_DOUBLE : | |
| 304 | 351 __ movptr(rdx, STATE(_stack)); // get top of stack |
| 0 | 352 if ( UseSSE > 1) { |
| 353 __ movdbl(xmm0, Address(rdx, wordSize)); | |
| 354 } else { | |
| 355 __ fld_d(Address(rdx, wordSize)); // push double result | |
| 356 } | |
| 357 break; | |
| 358 case T_OBJECT : | |
| 304 | 359 __ movptr(rdx, STATE(_stack)); // get top of stack |
| 360 __ movptr(rax, Address(rdx, wordSize)); // get result word 1 | |
| 0 | 361 __ verify_oop(rax); // verify it |
| 362 break; | |
| 363 default : ShouldNotReachHere(); | |
| 364 } | |
| 365 __ ret(0); | |
| 366 return entry; | |
| 367 } | |
| 368 | |
| 369 address CppInterpreter::return_entry(TosState state, int length) { | |
| 370 // make it look good in the debugger | |
| 371 return CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation); | |
| 372 } | |
| 373 | |
| 374 address CppInterpreter::deopt_entry(TosState state, int length) { | |
| 375 address ret = NULL; | |
| 376 if (length != 0) { | |
| 377 switch (state) { | |
| 378 case atos: ret = deopt_frame_manager_return_atos; break; | |
| 379 case btos: ret = deopt_frame_manager_return_btos; break; | |
| 380 case ctos: | |
| 381 case stos: | |
| 382 case itos: ret = deopt_frame_manager_return_itos; break; | |
| 383 case ltos: ret = deopt_frame_manager_return_ltos; break; | |
| 384 case ftos: ret = deopt_frame_manager_return_ftos; break; | |
| 385 case dtos: ret = deopt_frame_manager_return_dtos; break; | |
| 386 case vtos: ret = deopt_frame_manager_return_vtos; break; | |
| 387 } | |
| 388 } else { | |
| 389 ret = unctrap_frame_manager_entry; // re-execute the bytecode ( e.g. uncommon trap) | |
| 390 } | |
| 391 assert(ret != NULL, "Not initialized"); | |
| 392 return ret; | |
| 393 } | |
| 394 | |
| 395 // C++ Interpreter | |
| 396 void CppInterpreterGenerator::generate_compute_interpreter_state(const Register state, | |
| 397 const Register locals, | |
| 398 const Register sender_sp, | |
| 399 bool native) { | |
| 400 | |
| 401 // On entry the "locals" argument points to locals[0] (or where it would be in case no locals in | |
| 402 // a static method). "state" contains any previous frame manager state which we must save a link | |
| 403 // to in the newly generated state object. On return "state" is a pointer to the newly allocated | |
| 404 // state object. We must allocate and initialize a new interpretState object and the method | |
| 405 // expression stack. Because the returned result (if any) of the method will be placed on the caller's | |
| 406 // expression stack and this will overlap with locals[0] (and locals[1] if double/long) we must | |
| 407 // be sure to leave space on the caller's stack so that this result will not overwrite values when | |
| 408 // locals[0] and locals[1] do not exist (and in fact are return address and saved rbp). So when | |
| 409 // we are non-native we in essence ensure that locals[0-1] exist. We play an extra trick in | |
| 410 // non-product builds and initialize this last local with the previous interpreterState as | |
| 411 // this makes things look real nice in the debugger. | |
| 412 | |
| 413 // State on entry | |
| 414 // Assumes locals == &locals[0] | |
| 415 // Assumes state == any previous frame manager state (assuming call path from c++ interpreter) | |
| 416 // Assumes rax = return address | |
| 417 // rcx == senders_sp | |
| 418 // rbx == method | |
| 419 // Modifies rcx, rdx, rax | |
| 420 // Returns: | |
| 421 // state == address of new interpreterState | |
| 422 // rsp == bottom of method's expression stack. | |
| 423 | |
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424 const Address const_offset (rbx, Method::const_offset()); |
| 0 | 425 |
| 426 | |
| 427 // On entry sp is the sender's sp. This includes the space for the arguments | |
| 428 // that the sender pushed. If the sender pushed no args (a static) and the | |
| 429 // caller returns a long then we need two words on the sender's stack which | |
| 430 // are not present (although when we return a restore full size stack the | |
| 431 // space will be present). If we didn't allocate two words here then when | |
| 432 // we "push" the result of the caller's stack we would overwrite the return | |
| 433 // address and the saved rbp. Not good. So simply allocate 2 words now | |
| 434 // just to be safe. This is the "static long no_params() method" issue. | |
| 435 // See Lo.java for a testcase. | |
| 436 // We don't need this for native calls because they return result in | |
| 437 // register and the stack is expanded in the caller before we store | |
| 438 // the results on the stack. | |
| 439 | |
| 440 if (!native) { | |
| 441 #ifdef PRODUCT | |
| 304 | 442 __ subptr(rsp, 2*wordSize); |
| 0 | 443 #else /* PRODUCT */ |
| 304 | 444 __ push((int32_t)NULL_WORD); |
| 445 __ push(state); // make it look like a real argument | |
| 0 | 446 #endif /* PRODUCT */ |
| 447 } | |
| 448 | |
| 449 // Now that we are assure of space for stack result, setup typical linkage | |
| 450 | |
| 304 | 451 __ push(rax); |
| 0 | 452 __ enter(); |
| 453 | |
| 304 | 454 __ mov(rax, state); // save current state |
| 455 | |
| 456 __ lea(rsp, Address(rsp, -(int)sizeof(BytecodeInterpreter))); | |
| 457 __ mov(state, rsp); | |
| 458 | |
| 459 // rsi/r13 == state/locals rax == prevstate | |
| 0 | 460 |
| 461 // initialize the "shadow" frame so that use since C++ interpreter not directly | |
| 462 // recursive. Simpler to recurse but we can't trim expression stack as we call | |
| 463 // new methods. | |
| 304 | 464 __ movptr(STATE(_locals), locals); // state->_locals = locals() |
| 465 __ movptr(STATE(_self_link), state); // point to self | |
| 466 __ movptr(STATE(_prev_link), rax); // state->_link = state on entry (NULL or previous state) | |
| 467 __ movptr(STATE(_sender_sp), sender_sp); // state->_sender_sp = sender_sp | |
| 468 #ifdef _LP64 | |
| 469 __ movptr(STATE(_thread), r15_thread); // state->_bcp = codes() | |
| 470 #else | |
| 0 | 471 __ get_thread(rax); // get vm's javathread* |
| 304 | 472 __ movptr(STATE(_thread), rax); // state->_bcp = codes() |
| 473 #endif // _LP64 | |
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474 __ movptr(rdx, Address(rbx, Method::const_offset())); // get constantMethodOop |
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475 __ lea(rdx, Address(rdx, ConstMethod::codes_offset())); // get code base |
| 0 | 476 if (native) { |
| 304 | 477 __ movptr(STATE(_bcp), (int32_t)NULL_WORD); // state->_bcp = NULL |
| 0 | 478 } else { |
| 304 | 479 __ movptr(STATE(_bcp), rdx); // state->_bcp = codes() |
| 0 | 480 } |
| 304 | 481 __ xorptr(rdx, rdx); |
| 482 __ movptr(STATE(_oop_temp), rdx); // state->_oop_temp = NULL (only really needed for native) | |
| 483 __ movptr(STATE(_mdx), rdx); // state->_mdx = NULL | |
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484 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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485 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); |
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486 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); |
| 304 | 487 __ movptr(STATE(_constants), rdx); // state->_constants = constants() |
| 488 | |
| 489 __ movptr(STATE(_method), rbx); // state->_method = method() | |
| 490 __ movl(STATE(_msg), (int32_t) BytecodeInterpreter::method_entry); // state->_msg = initial method entry | |
| 491 __ movptr(STATE(_result._to_call._callee), (int32_t) NULL_WORD); // state->_result._to_call._callee_callee = NULL | |
| 492 | |
| 493 | |
| 494 __ movptr(STATE(_monitor_base), rsp); // set monitor block bottom (grows down) this would point to entry [0] | |
| 0 | 495 // entries run from -1..x where &monitor[x] == |
| 496 | |
| 497 { | |
| 498 // Must not attempt to lock method until we enter interpreter as gc won't be able to find the | |
| 499 // initial frame. However we allocate a free monitor so we don't have to shuffle the expression stack | |
| 500 // immediately. | |
| 501 | |
| 502 // synchronize method | |
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503 const Address access_flags (rbx, Method::access_flags_offset()); |
| 0 | 504 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; |
| 505 Label not_synced; | |
| 506 | |
| 507 __ movl(rax, access_flags); | |
| 508 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
| 509 __ jcc(Assembler::zero, not_synced); | |
| 510 | |
| 511 // Allocate initial monitor and pre initialize it | |
| 512 // get synchronization object | |
| 513 | |
| 514 Label done; | |
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515 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
| 0 | 516 __ movl(rax, access_flags); |
| 517 __ testl(rax, JVM_ACC_STATIC); | |
| 304 | 518 __ movptr(rax, Address(locals, 0)); // get receiver (assume this is frequent case) |
| 0 | 519 __ jcc(Assembler::zero, done); |
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520 __ movptr(rax, Address(rbx, Method::const_offset())); |
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521 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); |
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522 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); |
| 304 | 523 __ movptr(rax, Address(rax, mirror_offset)); |
| 0 | 524 __ bind(done); |
| 525 // add space for monitor & lock | |
| 304 | 526 __ subptr(rsp, entry_size); // add space for a monitor entry |
| 527 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object | |
| 0 | 528 __ bind(not_synced); |
| 529 } | |
| 530 | |
| 304 | 531 __ movptr(STATE(_stack_base), rsp); // set expression stack base ( == &monitors[-count]) |
| 0 | 532 if (native) { |
| 304 | 533 __ movptr(STATE(_stack), rsp); // set current expression stack tos |
| 534 __ movptr(STATE(_stack_limit), rsp); | |
| 0 | 535 } else { |
| 304 | 536 __ subptr(rsp, wordSize); // pre-push stack |
| 537 __ movptr(STATE(_stack), rsp); // set current expression stack tos | |
| 0 | 538 |
| 539 // compute full expression stack limit | |
| 540 | |
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541 const int extra_stack = 0; //6815692//Method::extra_stack_words(); |
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542 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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543 __ load_unsigned_short(rdx, Address(rdx, ConstMethod::max_stack_offset())); // get size of expression stack in words |
| 304 | 544 __ negptr(rdx); // so we can subtract in next step |
| 0 | 545 // Allocate expression stack |
| 710 | 546 __ lea(rsp, Address(rsp, rdx, Address::times_ptr, -extra_stack)); |
| 304 | 547 __ movptr(STATE(_stack_limit), rsp); |
| 0 | 548 } |
| 549 | |
| 304 | 550 #ifdef _LP64 |
| 551 // Make sure stack is properly aligned and sized for the abi | |
| 552 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
| 605 | 553 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) |
| 304 | 554 #endif // _LP64 |
| 555 | |
| 556 | |
| 557 | |
| 0 | 558 } |
| 559 | |
| 560 // Helpers for commoning out cases in the various type of method entries. | |
| 561 // | |
| 562 | |
| 563 // increment invocation count & check for overflow | |
| 564 // | |
| 565 // Note: checking for negative value instead of overflow | |
| 566 // so we have a 'sticky' overflow test | |
| 567 // | |
| 568 // rbx,: method | |
| 569 // rcx: invocation counter | |
| 570 // | |
| 571 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) { | |
| 572 | |
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573 const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset()); |
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574 const Address backedge_counter (rbx, Method::backedge_counter_offset() + InvocationCounter::counter_offset()); |
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575 |
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576 if (ProfileInterpreter) { // %%% Merge this into MethodData* |
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577 __ incrementl(Address(rbx,Method::interpreter_invocation_counter_offset())); |
| 0 | 578 } |
| 579 // Update standard invocation counters | |
| 580 __ movl(rax, backedge_counter); // load backedge counter | |
| 581 | |
| 582 __ increment(rcx, InvocationCounter::count_increment); | |
| 583 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits | |
| 584 | |
| 585 __ movl(invocation_counter, rcx); // save invocation count | |
| 586 __ addl(rcx, rax); // add both counters | |
| 587 | |
| 588 // profile_method is non-null only for interpreted method so | |
| 589 // profile_method != NULL == !native_call | |
| 590 // BytecodeInterpreter only calls for native so code is elided. | |
| 591 | |
| 592 __ cmp32(rcx, | |
| 593 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit)); | |
| 594 __ jcc(Assembler::aboveEqual, *overflow); | |
| 595 | |
| 596 } | |
| 597 | |
| 598 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { | |
| 599 | |
| 600 // C++ interpreter on entry | |
| 304 | 601 // rsi/r13 - new interpreter state pointer |
| 0 | 602 // rbp - interpreter frame pointer |
| 603 // rbx - method | |
| 604 | |
| 605 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] | |
| 606 // rbx, - method | |
| 607 // rcx - rcvr (assuming there is one) | |
| 608 // top of stack return address of interpreter caller | |
| 609 // rsp - sender_sp | |
| 610 | |
| 611 // C++ interpreter only | |
| 304 | 612 // rsi/r13 - previous interpreter state pointer |
| 0 | 613 |
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614 const Address size_of_parameters(rbx, Method::size_of_parameters_offset()); |
| 0 | 615 |
| 616 // InterpreterRuntime::frequency_counter_overflow takes one argument | |
| 617 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp). | |
| 618 // The call returns the address of the verified entry point for the method or NULL | |
| 619 // if the compilation did not complete (either went background or bailed out). | |
| 304 | 620 __ movptr(rax, (int32_t)false); |
| 0 | 621 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax); |
| 622 | |
| 623 // for c++ interpreter can rsi really be munged? | |
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624 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); // restore state |
| 304 | 625 __ movptr(rbx, Address(state, byte_offset_of(BytecodeInterpreter, _method))); // restore method |
| 626 __ movptr(rdi, Address(state, byte_offset_of(BytecodeInterpreter, _locals))); // get locals pointer | |
| 627 | |
| 0 | 628 __ jmp(*do_continue, relocInfo::none); |
| 629 | |
| 630 } | |
| 631 | |
| 632 void InterpreterGenerator::generate_stack_overflow_check(void) { | |
| 633 // see if we've got enough room on the stack for locals plus overhead. | |
| 634 // the expression stack grows down incrementally, so the normal guard | |
| 635 // page mechanism will work for that. | |
| 636 // | |
| 637 // Registers live on entry: | |
| 638 // | |
| 639 // Asm interpreter | |
| 640 // rdx: number of additional locals this frame needs (what we must check) | |
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641 // rbx,: Method* |
| 0 | 642 |
| 643 // C++ Interpreter | |
| 304 | 644 // rsi/r13: previous interpreter frame state object |
| 0 | 645 // rdi: &locals[0] |
| 646 // rcx: # of locals | |
| 647 // rdx: number of additional locals this frame needs (what we must check) | |
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648 // rbx: Method* |
| 0 | 649 |
| 650 // destroyed on exit | |
| 651 // rax, | |
| 652 | |
| 653 // NOTE: since the additional locals are also always pushed (wasn't obvious in | |
| 654 // generate_method_entry) so the guard should work for them too. | |
| 655 // | |
| 656 | |
| 657 // monitor entry size: see picture of stack set (generate_method_entry) and frame_i486.hpp | |
| 658 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
| 659 | |
| 660 // total overhead size: entry_size + (saved rbp, thru expr stack bottom). | |
| 661 // be sure to change this if you add/subtract anything to/from the overhead area | |
| 662 const int overhead_size = (int)sizeof(BytecodeInterpreter); | |
| 663 | |
| 664 const int page_size = os::vm_page_size(); | |
| 665 | |
| 666 Label after_frame_check; | |
| 667 | |
| 668 // compute rsp as if this were going to be the last frame on | |
| 669 // the stack before the red zone | |
| 670 | |
| 671 Label after_frame_check_pop; | |
| 672 | |
| 673 // save rsi == caller's bytecode ptr (c++ previous interp. state) | |
| 674 // QQQ problem here?? rsi overload???? | |
| 304 | 675 __ push(state); |
| 676 | |
| 677 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rsi); | |
| 678 | |
| 679 NOT_LP64(__ get_thread(thread)); | |
| 0 | 680 |
| 681 const Address stack_base(thread, Thread::stack_base_offset()); | |
| 682 const Address stack_size(thread, Thread::stack_size_offset()); | |
| 683 | |
| 684 // locals + overhead, in bytes | |
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685 // Always give one monitor to allow us to start interp if sync method. |
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686 // Any additional monitors need a check when moving the expression stack |
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687 const int one_monitor = frame::interpreter_frame_monitor_size() * wordSize; |
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688 const int extra_stack = 0; //6815692//Method::extra_stack_entries(); |
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689 __ movptr(rax, Address(rbx, Method::const_offset())); |
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690 __ load_unsigned_short(rax, Address(rax, ConstMethod::max_stack_offset())); // get size of expression stack in words |
| 710 | 691 __ lea(rax, Address(noreg, rax, Interpreter::stackElementScale(), extra_stack + one_monitor)); |
| 304 | 692 __ lea(rax, Address(rax, rdx, Interpreter::stackElementScale(), overhead_size)); |
| 0 | 693 |
| 694 #ifdef ASSERT | |
| 695 Label stack_base_okay, stack_size_okay; | |
| 696 // verify that thread stack base is non-zero | |
| 304 | 697 __ cmpptr(stack_base, (int32_t)0); |
| 0 | 698 __ jcc(Assembler::notEqual, stack_base_okay); |
| 699 __ stop("stack base is zero"); | |
| 700 __ bind(stack_base_okay); | |
| 701 // verify that thread stack size is non-zero | |
| 304 | 702 __ cmpptr(stack_size, (int32_t)0); |
| 0 | 703 __ jcc(Assembler::notEqual, stack_size_okay); |
| 704 __ stop("stack size is zero"); | |
| 705 __ bind(stack_size_okay); | |
| 706 #endif | |
| 707 | |
| 708 // Add stack base to locals and subtract stack size | |
| 304 | 709 __ addptr(rax, stack_base); |
| 710 __ subptr(rax, stack_size); | |
| 0 | 711 |
| 712 // We should have a magic number here for the size of the c++ interpreter frame. | |
| 713 // We can't actually tell this ahead of time. The debug version size is around 3k | |
| 714 // product is 1k and fastdebug is 4k | |
| 715 const int slop = 6 * K; | |
| 716 | |
| 717 // Use the maximum number of pages we might bang. | |
| 718 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : | |
| 719 (StackRedPages+StackYellowPages); | |
| 720 // Only need this if we are stack banging which is temporary while | |
| 721 // we're debugging. | |
| 304 | 722 __ addptr(rax, slop + 2*max_pages * page_size); |
| 0 | 723 |
| 724 // check against the current stack bottom | |
| 304 | 725 __ cmpptr(rsp, rax); |
| 0 | 726 __ jcc(Assembler::above, after_frame_check_pop); |
| 727 | |
| 304 | 728 __ pop(state); // get c++ prev state. |
| 0 | 729 |
| 730 // throw exception return address becomes throwing pc | |
| 731 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
| 732 | |
| 733 // all done with frame size check | |
| 734 __ bind(after_frame_check_pop); | |
| 304 | 735 __ pop(state); |
| 0 | 736 |
| 737 __ bind(after_frame_check); | |
| 738 } | |
| 739 | |
| 740 // Find preallocated monitor and lock method (C++ interpreter) | |
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741 // rbx - Method* |
| 0 | 742 // |
| 743 void InterpreterGenerator::lock_method(void) { | |
| 304 | 744 // assumes state == rsi/r13 == pointer to current interpreterState |
| 745 // minimally destroys rax, rdx|c_rarg1, rdi | |
| 0 | 746 // |
| 747 // synchronize method | |
| 748 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
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749 const Address access_flags (rbx, Method::access_flags_offset()); |
| 0 | 750 |
| 304 | 751 const Register monitor = NOT_LP64(rdx) LP64_ONLY(c_rarg1); |
| 752 | |
| 0 | 753 // find initial monitor i.e. monitors[-1] |
| 304 | 754 __ movptr(monitor, STATE(_monitor_base)); // get monitor bottom limit |
| 755 __ subptr(monitor, entry_size); // point to initial monitor | |
| 0 | 756 |
| 757 #ifdef ASSERT | |
| 758 { Label L; | |
| 759 __ movl(rax, access_flags); | |
| 760 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
| 761 __ jcc(Assembler::notZero, L); | |
| 762 __ stop("method doesn't need synchronization"); | |
| 763 __ bind(L); | |
| 764 } | |
| 765 #endif // ASSERT | |
| 766 // get synchronization object | |
| 767 { Label done; | |
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768 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
| 0 | 769 __ movl(rax, access_flags); |
| 304 | 770 __ movptr(rdi, STATE(_locals)); // prepare to get receiver (assume common case) |
| 0 | 771 __ testl(rax, JVM_ACC_STATIC); |
| 304 | 772 __ movptr(rax, Address(rdi, 0)); // get receiver (assume this is frequent case) |
| 0 | 773 __ jcc(Assembler::zero, done); |
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774 __ movptr(rax, Address(rbx, Method::const_offset())); |
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775 __ movptr(rax, Address(rax, ConstMethod::constants_offset())); |
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776 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes())); |
| 304 | 777 __ movptr(rax, Address(rax, mirror_offset)); |
| 0 | 778 __ bind(done); |
| 779 } | |
| 780 #ifdef ASSERT | |
| 781 { Label L; | |
| 304 | 782 __ cmpptr(rax, Address(monitor, BasicObjectLock::obj_offset_in_bytes())); // correct object? |
| 0 | 783 __ jcc(Assembler::equal, L); |
| 784 __ stop("wrong synchronization lobject"); | |
| 785 __ bind(L); | |
| 786 } | |
| 787 #endif // ASSERT | |
| 304 | 788 // can destroy rax, rdx|c_rarg1, rcx, and (via call_VM) rdi! |
| 789 __ lock_object(monitor); | |
| 0 | 790 } |
| 791 | |
| 792 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry | |
| 793 | |
| 794 address InterpreterGenerator::generate_accessor_entry(void) { | |
| 795 | |
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796 // rbx: Method* |
| 304 | 797 |
| 798 // rsi/r13: senderSP must preserved for slow path, set SP to it on fast path | |
| 0 | 799 |
| 800 Label xreturn_path; | |
| 801 | |
| 802 // do fastpath for resolved accessor methods | |
| 803 if (UseFastAccessorMethods) { | |
| 804 | |
| 805 address entry_point = __ pc(); | |
| 806 | |
| 807 Label slow_path; | |
| 808 // If we need a safepoint check, generate full interpreter entry. | |
| 809 ExternalAddress state(SafepointSynchronize::address_of_state()); | |
| 810 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
| 811 SafepointSynchronize::_not_synchronized); | |
| 812 | |
| 813 __ jcc(Assembler::notEqual, slow_path); | |
| 814 // ASM/C++ Interpreter | |
| 815 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1 | |
| 816 // Note: We can only use this code if the getfield has been resolved | |
| 817 // and if we don't have a null-pointer exception => check for | |
| 818 // these conditions first and use slow path if necessary. | |
| 819 // rbx,: method | |
| 820 // rcx: receiver | |
| 304 | 821 __ movptr(rax, Address(rsp, wordSize)); |
| 0 | 822 |
| 823 // check if local 0 != NULL and read field | |
| 304 | 824 __ testptr(rax, rax); |
| 0 | 825 __ jcc(Assembler::zero, slow_path); |
| 826 | |
| 827 // read first instruction word and extract bytecode @ 1 and index @ 2 | |
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828 __ movptr(rdx, Address(rbx, Method::const_offset())); |
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829 __ movptr(rdi, Address(rdx, ConstMethod::constants_offset())); |
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830 __ movl(rdx, Address(rdx, ConstMethod::codes_offset())); |
| 0 | 831 // Shift codes right to get the index on the right. |
| 832 // The bytecode fetched looks like <index><0xb4><0x2a> | |
| 833 __ shrl(rdx, 2*BitsPerByte); | |
| 834 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size()))); | |
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835 __ movptr(rdi, Address(rdi, ConstantPool::cache_offset_in_bytes())); |
| 0 | 836 |
| 837 // rax,: local 0 | |
| 838 // rbx,: method | |
| 839 // rcx: receiver - do not destroy since it is needed for slow path! | |
| 840 // rcx: scratch | |
| 841 // rdx: constant pool cache index | |
| 842 // rdi: constant pool cache | |
| 304 | 843 // rsi/r13: sender sp |
| 0 | 844 |
| 845 // check if getfield has been resolved and read constant pool cache entry | |
| 846 // check the validity of the cache entry by testing whether _indices field | |
| 847 // contains Bytecode::_getfield in b1 byte. | |
| 848 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below"); | |
| 849 __ movl(rcx, | |
| 850 Address(rdi, | |
| 851 rdx, | |
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852 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset())); |
| 0 | 853 __ shrl(rcx, 2*BitsPerByte); |
| 854 __ andl(rcx, 0xFF); | |
| 855 __ cmpl(rcx, Bytecodes::_getfield); | |
| 856 __ jcc(Assembler::notEqual, slow_path); | |
| 857 | |
| 858 // Note: constant pool entry is not valid before bytecode is resolved | |
| 304 | 859 __ movptr(rcx, |
| 0 | 860 Address(rdi, |
| 861 rdx, | |
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862 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset())); |
| 0 | 863 __ movl(rdx, |
| 864 Address(rdi, | |
| 865 rdx, | |
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866 Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); |
| 0 | 867 |
| 868 Label notByte, notShort, notChar; | |
| 869 const Address field_address (rax, rcx, Address::times_1); | |
| 870 | |
| 871 // Need to differentiate between igetfield, agetfield, bgetfield etc. | |
| 872 // because they are different sizes. | |
| 873 // Use the type from the constant pool cache | |
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874 __ shrl(rdx, ConstantPoolCacheEntry::tos_state_shift); |
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875 // Make sure we don't need to mask rdx after the above shift |
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876 ConstantPoolCacheEntry::verify_tos_state_shift(); |
| 304 | 877 #ifdef _LP64 |
| 878 Label notObj; | |
| 879 __ cmpl(rdx, atos); | |
| 880 __ jcc(Assembler::notEqual, notObj); | |
| 881 // atos | |
| 882 __ movptr(rax, field_address); | |
| 883 __ jmp(xreturn_path); | |
| 884 | |
| 885 __ bind(notObj); | |
| 886 #endif // _LP64 | |
| 0 | 887 __ cmpl(rdx, btos); |
| 888 __ jcc(Assembler::notEqual, notByte); | |
| 889 __ load_signed_byte(rax, field_address); | |
| 890 __ jmp(xreturn_path); | |
| 891 | |
| 892 __ bind(notByte); | |
| 893 __ cmpl(rdx, stos); | |
| 894 __ jcc(Assembler::notEqual, notShort); | |
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895 __ load_signed_short(rax, field_address); |
| 0 | 896 __ jmp(xreturn_path); |
| 897 | |
| 898 __ bind(notShort); | |
| 899 __ cmpl(rdx, ctos); | |
| 900 __ jcc(Assembler::notEqual, notChar); | |
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901 __ load_unsigned_short(rax, field_address); |
| 0 | 902 __ jmp(xreturn_path); |
| 903 | |
| 904 __ bind(notChar); | |
| 905 #ifdef ASSERT | |
| 906 Label okay; | |
| 304 | 907 #ifndef _LP64 |
| 0 | 908 __ cmpl(rdx, atos); |
| 909 __ jcc(Assembler::equal, okay); | |
| 304 | 910 #endif // _LP64 |
| 0 | 911 __ cmpl(rdx, itos); |
| 912 __ jcc(Assembler::equal, okay); | |
| 913 __ stop("what type is this?"); | |
| 914 __ bind(okay); | |
| 915 #endif // ASSERT | |
| 916 // All the rest are a 32 bit wordsize | |
| 917 __ movl(rax, field_address); | |
| 918 | |
| 919 __ bind(xreturn_path); | |
| 920 | |
| 921 // _ireturn/_areturn | |
| 304 | 922 __ pop(rdi); // get return address |
| 923 __ mov(rsp, sender_sp_on_entry); // set sp to sender sp | |
| 0 | 924 __ jmp(rdi); |
| 925 | |
| 926 // generate a vanilla interpreter entry as the slow path | |
| 927 __ bind(slow_path); | |
| 928 // We will enter c++ interpreter looking like it was | |
| 929 // called by the call_stub this will cause it to return | |
| 930 // a tosca result to the invoker which might have been | |
| 931 // the c++ interpreter itself. | |
| 932 | |
| 933 __ jmp(fast_accessor_slow_entry_path); | |
| 934 return entry_point; | |
| 935 | |
| 936 } else { | |
| 937 return NULL; | |
| 938 } | |
| 939 | |
| 940 } | |
| 941 | |
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942 address InterpreterGenerator::generate_Reference_get_entry(void) { |
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943 #ifndef SERIALGC |
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944 if (UseG1GC) { |
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945 // We need to generate have a routine that generates code to: |
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946 // * load the value in the referent field |
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947 // * passes that value to the pre-barrier. |
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948 // |
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949 // In the case of G1 this will record the value of the |
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950 // referent in an SATB buffer if marking is active. |
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951 // This will cause concurrent marking to mark the referent |
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952 // field as live. |
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953 Unimplemented(); |
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954 } |
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955 #endif // SERIALGC |
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956 |
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957 // If G1 is not enabled then attempt to go through the accessor entry point |
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958 // Reference.get is an accessor |
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959 return generate_accessor_entry(); |
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960 } |
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961 |
| 0 | 962 // |
| 963 // C++ Interpreter stub for calling a native method. | |
| 964 // This sets up a somewhat different looking stack for calling the native method | |
| 965 // than the typical interpreter frame setup but still has the pointer to | |
| 966 // an interpreter state. | |
| 967 // | |
| 968 | |
| 969 address InterpreterGenerator::generate_native_entry(bool synchronized) { | |
| 970 // determine code generation flags | |
| 971 bool inc_counter = UseCompiler || CountCompiledCalls; | |
| 972 | |
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973 // rbx: Method* |
| 0 | 974 // rcx: receiver (unused) |
| 304 | 975 // rsi/r13: previous interpreter state (if called from C++ interpreter) must preserve |
| 976 // in any case. If called via c1/c2/call_stub rsi/r13 is junk (to use) but harmless | |
| 0 | 977 // to save/restore. |
| 978 address entry_point = __ pc(); | |
| 979 | |
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980 const Address size_of_parameters(rbx, Method::size_of_parameters_offset()); |
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981 const Address size_of_locals (rbx, Method::size_of_locals_offset()); |
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982 const Address invocation_counter(rbx, Method::invocation_counter_offset() + InvocationCounter::counter_offset()); |
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983 const Address access_flags (rbx, Method::access_flags_offset()); |
| 0 | 984 |
| 304 | 985 // rsi/r13 == state/locals rdi == prevstate |
| 0 | 986 const Register locals = rdi; |
| 987 | |
| 988 // get parameter size (always needed) | |
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989 __ load_unsigned_short(rcx, size_of_parameters); |
| 0 | 990 |
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991 // rbx: Method* |
| 0 | 992 // rcx: size of parameters |
| 304 | 993 __ pop(rax); // get return address |
| 0 | 994 // for natives the size of locals is zero |
| 995 | |
| 996 // compute beginning of parameters /locals | |
| 304 | 997 __ lea(locals, Address(rsp, rcx, Address::times_ptr, -wordSize)); |
| 0 | 998 |
| 999 // initialize fixed part of activation frame | |
| 1000 | |
| 1001 // Assumes rax = return address | |
| 1002 | |
| 1003 // allocate and initialize new interpreterState and method expression stack | |
| 1004 // IN(locals) -> locals | |
| 1005 // IN(state) -> previous frame manager state (NULL from stub/c1/c2) | |
| 1006 // destroys rax, rcx, rdx | |
| 1007 // OUT (state) -> new interpreterState | |
| 1008 // OUT(rsp) -> bottom of methods expression stack | |
| 1009 | |
| 1010 // save sender_sp | |
| 304 | 1011 __ mov(rcx, sender_sp_on_entry); |
| 0 | 1012 // start with NULL previous state |
| 304 | 1013 __ movptr(state, (int32_t)NULL_WORD); |
| 0 | 1014 generate_compute_interpreter_state(state, locals, rcx, true); |
| 1015 | |
| 1016 #ifdef ASSERT | |
| 1017 { Label L; | |
| 304 | 1018 __ movptr(rax, STATE(_stack_base)); |
| 1019 #ifdef _LP64 | |
| 1020 // duplicate the alignment rsp got after setting stack_base | |
| 1021 __ subptr(rax, frame::arg_reg_save_area_bytes); // windows | |
| 605 | 1022 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
| 304 | 1023 #endif // _LP64 |
| 1024 __ cmpptr(rax, rsp); | |
| 0 | 1025 __ jcc(Assembler::equal, L); |
| 1026 __ stop("broken stack frame setup in interpreter"); | |
| 1027 __ bind(L); | |
| 1028 } | |
| 1029 #endif | |
| 1030 | |
| 1031 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count | |
| 1032 | |
| 304 | 1033 const Register unlock_thread = LP64_ONLY(r15_thread) NOT_LP64(rax); |
| 1034 NOT_LP64(__ movptr(unlock_thread, STATE(_thread));) // get thread | |
| 0 | 1035 // Since at this point in the method invocation the exception handler |
| 1036 // would try to exit the monitor of synchronized methods which hasn't | |
| 1037 // been entered yet, we set the thread local variable | |
| 1038 // _do_not_unlock_if_synchronized to true. The remove_activation will | |
| 1039 // check this flag. | |
| 1040 | |
| 304 | 1041 const Address do_not_unlock_if_synchronized(unlock_thread, |
| 0 | 1042 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); |
| 1043 __ movbool(do_not_unlock_if_synchronized, true); | |
| 1044 | |
| 1045 // make sure method is native & not abstract | |
| 1046 #ifdef ASSERT | |
| 1047 __ movl(rax, access_flags); | |
| 1048 { | |
| 1049 Label L; | |
| 1050 __ testl(rax, JVM_ACC_NATIVE); | |
| 1051 __ jcc(Assembler::notZero, L); | |
| 1052 __ stop("tried to execute non-native method as native"); | |
| 1053 __ bind(L); | |
| 1054 } | |
| 1055 { Label L; | |
| 1056 __ testl(rax, JVM_ACC_ABSTRACT); | |
| 1057 __ jcc(Assembler::zero, L); | |
| 1058 __ stop("tried to execute abstract method in interpreter"); | |
| 1059 __ bind(L); | |
| 1060 } | |
| 1061 #endif | |
| 1062 | |
| 1063 | |
| 1064 // increment invocation count & check for overflow | |
| 1065 Label invocation_counter_overflow; | |
| 1066 if (inc_counter) { | |
| 1067 generate_counter_incr(&invocation_counter_overflow, NULL, NULL); | |
| 1068 } | |
| 1069 | |
| 1070 Label continue_after_compile; | |
| 1071 | |
| 1072 __ bind(continue_after_compile); | |
| 1073 | |
| 1074 bang_stack_shadow_pages(true); | |
| 1075 | |
| 1076 // reset the _do_not_unlock_if_synchronized flag | |
| 304 | 1077 NOT_LP64(__ movl(rax, STATE(_thread));) // get thread |
| 0 | 1078 __ movbool(do_not_unlock_if_synchronized, false); |
| 1079 | |
| 1080 | |
| 1081 // check for synchronized native methods | |
| 1082 // | |
| 1083 // Note: This must happen *after* invocation counter check, since | |
| 1084 // when overflow happens, the method should not be locked. | |
| 1085 if (synchronized) { | |
| 1086 // potentially kills rax, rcx, rdx, rdi | |
| 1087 lock_method(); | |
| 1088 } else { | |
| 1089 // no synchronization necessary | |
| 1090 #ifdef ASSERT | |
| 1091 { Label L; | |
| 1092 __ movl(rax, access_flags); | |
| 1093 __ testl(rax, JVM_ACC_SYNCHRONIZED); | |
| 1094 __ jcc(Assembler::zero, L); | |
| 1095 __ stop("method needs synchronization"); | |
| 1096 __ bind(L); | |
| 1097 } | |
| 1098 #endif | |
| 1099 } | |
| 1100 | |
| 1101 // start execution | |
| 1102 | |
| 1103 // jvmti support | |
| 1104 __ notify_method_entry(); | |
| 1105 | |
| 1106 // work registers | |
| 1107 const Register method = rbx; | |
| 304 | 1108 const Register thread = LP64_ONLY(r15_thread) NOT_LP64(rdi); |
| 1109 const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); // rcx|rscratch1 | |
| 0 | 1110 |
| 1111 // allocate space for parameters | |
| 304 | 1112 __ movptr(method, STATE(_method)); |
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1113 __ verify_method_ptr(method); |
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1114 __ load_unsigned_short(t, Address(method, Method::size_of_parameters_offset())); |
| 0 | 1115 __ shll(t, 2); |
| 304 | 1116 #ifdef _LP64 |
| 1117 __ subptr(rsp, t); | |
| 1118 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
| 605 | 1119 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) |
| 304 | 1120 #else |
| 1121 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror | |
| 1122 __ subptr(rsp, t); | |
| 1123 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics | |
| 1124 #endif // _LP64 | |
| 0 | 1125 |
| 1126 // get signature handler | |
| 1127 Label pending_exception_present; | |
| 1128 | |
| 1129 { Label L; | |
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1130 __ movptr(t, Address(method, Method::signature_handler_offset())); |
| 304 | 1131 __ testptr(t, t); |
| 0 | 1132 __ jcc(Assembler::notZero, L); |
| 1133 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method, false); | |
| 304 | 1134 __ movptr(method, STATE(_method)); |
| 1135 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
| 0 | 1136 __ jcc(Assembler::notEqual, pending_exception_present); |
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1137 __ verify_method_ptr(method); |
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1138 __ movptr(t, Address(method, Method::signature_handler_offset())); |
| 0 | 1139 __ bind(L); |
| 1140 } | |
| 1141 #ifdef ASSERT | |
| 1142 { | |
| 1143 Label L; | |
| 304 | 1144 __ push(t); |
| 0 | 1145 __ get_thread(t); // get vm's javathread* |
| 304 | 1146 __ cmpptr(t, STATE(_thread)); |
| 0 | 1147 __ jcc(Assembler::equal, L); |
| 1148 __ int3(); | |
| 1149 __ bind(L); | |
| 304 | 1150 __ pop(t); |
| 0 | 1151 } |
| 1152 #endif // | |
| 1153 | |
| 304 | 1154 const Register from_ptr = InterpreterRuntime::SignatureHandlerGenerator::from(); |
| 0 | 1155 // call signature handler |
| 1156 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code"); | |
| 304 | 1157 |
| 0 | 1158 // The generated handlers do not touch RBX (the method oop). |
| 1159 // However, large signatures cannot be cached and are generated | |
| 1160 // each time here. The slow-path generator will blow RBX | |
| 1161 // sometime, so we must reload it after the call. | |
| 304 | 1162 __ movptr(from_ptr, STATE(_locals)); // get the from pointer |
| 0 | 1163 __ call(t); |
| 304 | 1164 __ movptr(method, STATE(_method)); |
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1165 __ verify_method_ptr(method); |
| 0 | 1166 |
| 1167 // result handler is in rax | |
| 1168 // set result handler | |
| 304 | 1169 __ movptr(STATE(_result_handler), rax); |
| 1170 | |
| 1171 | |
| 1172 // get native function entry point | |
| 1173 { Label L; | |
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1174 __ movptr(rax, Address(method, Method::native_function_offset())); |
| 304 | 1175 __ testptr(rax, rax); |
| 1176 __ jcc(Assembler::notZero, L); | |
| 1177 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method); | |
| 1178 __ movptr(method, STATE(_method)); | |
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1179 __ verify_method_ptr(method); |
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1180 __ movptr(rax, Address(method, Method::native_function_offset())); |
| 304 | 1181 __ bind(L); |
| 1182 } | |
| 0 | 1183 |
| 1184 // pass mirror handle if static call | |
| 1185 { Label L; | |
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1186 const int mirror_offset = in_bytes(Klass::java_mirror_offset()); |
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1187 __ movl(t, Address(method, Method::access_flags_offset())); |
| 0 | 1188 __ testl(t, JVM_ACC_STATIC); |
| 1189 __ jcc(Assembler::zero, L); | |
| 1190 // get mirror | |
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1191 __ movptr(t, Address(method, Method:: const_offset())); |
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1192 __ movptr(t, Address(t, ConstMethod::constants_offset())); |
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1193 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); |
| 304 | 1194 __ movptr(t, Address(t, mirror_offset)); |
| 0 | 1195 // copy mirror into activation object |
| 304 | 1196 __ movptr(STATE(_oop_temp), t); |
| 0 | 1197 // pass handle to mirror |
| 304 | 1198 #ifdef _LP64 |
| 1199 __ lea(c_rarg1, STATE(_oop_temp)); | |
| 1200 #else | |
| 1201 __ lea(t, STATE(_oop_temp)); | |
| 1202 __ movptr(Address(rsp, wordSize), t); | |
| 1203 #endif // _LP64 | |
| 0 | 1204 __ bind(L); |
| 1205 } | |
| 1206 #ifdef ASSERT | |
| 1207 { | |
| 1208 Label L; | |
| 304 | 1209 __ push(t); |
| 0 | 1210 __ get_thread(t); // get vm's javathread* |
| 304 | 1211 __ cmpptr(t, STATE(_thread)); |
| 0 | 1212 __ jcc(Assembler::equal, L); |
| 1213 __ int3(); | |
| 1214 __ bind(L); | |
| 304 | 1215 __ pop(t); |
| 0 | 1216 } |
| 1217 #endif // | |
| 1218 | |
| 1219 // pass JNIEnv | |
| 304 | 1220 #ifdef _LP64 |
| 1221 __ lea(c_rarg0, Address(thread, JavaThread::jni_environment_offset())); | |
| 1222 #else | |
| 1223 __ movptr(thread, STATE(_thread)); // get thread | |
| 1224 __ lea(t, Address(thread, JavaThread::jni_environment_offset())); | |
| 1225 | |
| 1226 __ movptr(Address(rsp, 0), t); | |
| 1227 #endif // _LP64 | |
| 1228 | |
| 0 | 1229 #ifdef ASSERT |
| 1230 { | |
| 1231 Label L; | |
| 304 | 1232 __ push(t); |
| 0 | 1233 __ get_thread(t); // get vm's javathread* |
| 304 | 1234 __ cmpptr(t, STATE(_thread)); |
| 0 | 1235 __ jcc(Assembler::equal, L); |
| 1236 __ int3(); | |
| 1237 __ bind(L); | |
| 304 | 1238 __ pop(t); |
| 0 | 1239 } |
| 1240 #endif // | |
| 1241 | |
| 1242 #ifdef ASSERT | |
| 1243 { Label L; | |
| 1244 __ movl(t, Address(thread, JavaThread::thread_state_offset())); | |
| 1245 __ cmpl(t, _thread_in_Java); | |
| 1246 __ jcc(Assembler::equal, L); | |
| 1247 __ stop("Wrong thread state in native stub"); | |
| 1248 __ bind(L); | |
| 1249 } | |
| 1250 #endif | |
| 1251 | |
| 1252 // Change state to native (we save the return address in the thread, since it might not | |
| 1253 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
| 1254 // points into the right code segment. It does not have to be the correct return pc. | |
| 1255 | |
| 1256 __ set_last_Java_frame(thread, noreg, rbp, __ pc()); | |
| 1257 | |
| 1258 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); | |
| 1259 | |
| 1260 __ call(rax); | |
| 1261 | |
| 1262 // result potentially in rdx:rax or ST0 | |
| 304 | 1263 __ movptr(method, STATE(_method)); |
| 1264 NOT_LP64(__ movptr(thread, STATE(_thread));) // get thread | |
| 0 | 1265 |
| 1266 // The potential result is in ST(0) & rdx:rax | |
| 1267 // With C++ interpreter we leave any possible result in ST(0) until we are in result handler and then | |
| 1268 // we do the appropriate stuff for returning the result. rdx:rax must always be saved because just about | |
| 1269 // anything we do here will destroy it, st(0) is only saved if we re-enter the vm where it would | |
| 1270 // be destroyed. | |
| 1271 // It is safe to do these pushes because state is _thread_in_native and return address will be found | |
| 1272 // via _last_native_pc and not via _last_jave_sp | |
| 1273 | |
| 304 | 1274 // Must save the value of ST(0)/xmm0 since it could be destroyed before we get to result handler |
| 0 | 1275 { Label Lpush, Lskip; |
| 1276 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); | |
| 1277 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); | |
| 1278 __ cmpptr(STATE(_result_handler), float_handler.addr()); | |
| 1279 __ jcc(Assembler::equal, Lpush); | |
| 1280 __ cmpptr(STATE(_result_handler), double_handler.addr()); | |
| 1281 __ jcc(Assembler::notEqual, Lskip); | |
| 1282 __ bind(Lpush); | |
| 304 | 1283 __ subptr(rsp, 2*wordSize); |
| 1284 if ( UseSSE < 2 ) { | |
| 1285 __ fstp_d(Address(rsp, 0)); | |
| 1286 } else { | |
| 1287 __ movdbl(Address(rsp, 0), xmm0); | |
| 1288 } | |
| 0 | 1289 __ bind(Lskip); |
| 1290 } | |
| 1291 | |
| 304 | 1292 // save rax:rdx for potential use by result handler. |
| 1293 __ push(rax); | |
| 1294 #ifndef _LP64 | |
| 1295 __ push(rdx); | |
| 1296 #endif // _LP64 | |
| 0 | 1297 |
| 1298 // Either restore the MXCSR register after returning from the JNI Call | |
| 1299 // or verify that it wasn't changed. | |
| 1300 if (VM_Version::supports_sse()) { | |
| 1301 if (RestoreMXCSROnJNICalls) { | |
| 1302 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std())); | |
| 1303 } | |
| 1304 else if (CheckJNICalls ) { | |
| 304 | 1305 __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry())); |
| 0 | 1306 } |
| 1307 } | |
| 1308 | |
| 304 | 1309 #ifndef _LP64 |
| 0 | 1310 // Either restore the x87 floating pointer control word after returning |
| 1311 // from the JNI call or verify that it wasn't changed. | |
| 1312 if (CheckJNICalls) { | |
| 304 | 1313 __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry())); |
| 0 | 1314 } |
| 304 | 1315 #endif // _LP64 |
| 0 | 1316 |
| 1317 | |
| 1318 // change thread state | |
| 1319 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans); | |
| 1320 if(os::is_MP()) { | |
| 1321 // Write serialization page so VM thread can do a pseudo remote membar. | |
| 1322 // We use the current thread pointer to calculate a thread specific | |
| 1323 // offset to write to within the page. This minimizes bus traffic | |
| 1324 // due to cache line collision. | |
| 1325 __ serialize_memory(thread, rcx); | |
| 1326 } | |
| 1327 | |
| 1328 // check for safepoint operation in progress and/or pending suspend requests | |
| 1329 { Label Continue; | |
| 1330 | |
| 1331 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), | |
| 1332 SafepointSynchronize::_not_synchronized); | |
| 1333 | |
| 1334 // threads running native code and they are expected to self-suspend | |
| 1335 // when leaving the _thread_in_native state. We need to check for | |
| 1336 // pending suspend requests here. | |
| 1337 Label L; | |
| 1338 __ jcc(Assembler::notEqual, L); | |
| 1339 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); | |
| 1340 __ jcc(Assembler::equal, Continue); | |
| 1341 __ bind(L); | |
| 1342 | |
| 1343 // Don't use call_VM as it will see a possible pending exception and forward it | |
| 1344 // and never return here preventing us from clearing _last_native_pc down below. | |
| 1345 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
| 304 | 1346 // preserved and correspond to the bcp/locals pointers. |
| 0 | 1347 // |
| 304 | 1348 |
| 1349 ((MacroAssembler*)_masm)->call_VM_leaf(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans), | |
| 1350 thread); | |
| 0 | 1351 __ increment(rsp, wordSize); |
| 1352 | |
| 304 | 1353 __ movptr(method, STATE(_method)); |
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1354 __ verify_method_ptr(method); |
| 304 | 1355 __ movptr(thread, STATE(_thread)); // get thread |
| 0 | 1356 |
| 1357 __ bind(Continue); | |
| 1358 } | |
| 1359 | |
| 1360 // change thread state | |
| 1361 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
| 1362 | |
| 1363 __ reset_last_Java_frame(thread, true, true); | |
| 1364 | |
| 1365 // reset handle block | |
| 304 | 1366 __ movptr(t, Address(thread, JavaThread::active_handles_offset())); |
| 1367 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); | |
| 0 | 1368 |
| 1369 // If result was an oop then unbox and save it in the frame | |
| 1370 { Label L; | |
| 1371 Label no_oop, store_result; | |
| 1372 ExternalAddress oop_handler(AbstractInterpreter::result_handler(T_OBJECT)); | |
| 1373 __ cmpptr(STATE(_result_handler), oop_handler.addr()); | |
| 1374 __ jcc(Assembler::notEqual, no_oop); | |
| 304 | 1375 #ifndef _LP64 |
| 1376 __ pop(rdx); | |
| 1377 #endif // _LP64 | |
| 1378 __ pop(rax); | |
| 1379 __ testptr(rax, rax); | |
| 0 | 1380 __ jcc(Assembler::zero, store_result); |
| 1381 // unbox | |
| 304 | 1382 __ movptr(rax, Address(rax, 0)); |
| 0 | 1383 __ bind(store_result); |
| 304 | 1384 __ movptr(STATE(_oop_temp), rax); |
| 0 | 1385 // keep stack depth as expected by pushing oop which will eventually be discarded |
| 304 | 1386 __ push(rax); |
| 1387 #ifndef _LP64 | |
| 1388 __ push(rdx); | |
| 1389 #endif // _LP64 | |
| 0 | 1390 __ bind(no_oop); |
| 1391 } | |
| 1392 | |
| 1393 { | |
| 1394 Label no_reguard; | |
| 1395 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
| 1396 __ jcc(Assembler::notEqual, no_reguard); | |
| 1397 | |
| 304 | 1398 __ pusha(); |
| 0 | 1399 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
| 304 | 1400 __ popa(); |
| 0 | 1401 |
| 1402 __ bind(no_reguard); | |
| 1403 } | |
| 1404 | |
| 1405 | |
| 1406 // QQQ Seems like for native methods we simply return and the caller will see the pending | |
| 1407 // exception and do the right thing. Certainly the interpreter will, don't know about | |
| 1408 // compiled methods. | |
| 1409 // Seems that the answer to above is no this is wrong. The old code would see the exception | |
| 1410 // and forward it before doing the unlocking and notifying jvmdi that method has exited. | |
| 1411 // This seems wrong need to investigate the spec. | |
| 1412 | |
| 1413 // handle exceptions (exception handling will handle unlocking!) | |
| 1414 { Label L; | |
| 304 | 1415 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| 0 | 1416 __ jcc(Assembler::zero, L); |
| 1417 __ bind(pending_exception_present); | |
| 1418 | |
| 1419 // There are potential results on the stack (rax/rdx, ST(0)) we ignore these and simply | |
| 1420 // return and let caller deal with exception. This skips the unlocking here which | |
| 1421 // seems wrong but seems to be what asm interpreter did. Can't find this in the spec. | |
| 1422 // Note: must preverve method in rbx | |
| 1423 // | |
| 1424 | |
| 1425 // remove activation | |
| 1426 | |
| 304 | 1427 __ movptr(t, STATE(_sender_sp)); |
| 0 | 1428 __ leave(); // remove frame anchor |
| 304 | 1429 __ pop(rdi); // get return address |
| 1430 __ movptr(state, STATE(_prev_link)); // get previous state for return | |
| 1431 __ mov(rsp, t); // set sp to sender sp | |
| 1432 __ push(rdi); // push throwing pc | |
| 0 | 1433 // The skips unlocking!! This seems to be what asm interpreter does but seems |
| 1434 // very wrong. Not clear if this violates the spec. | |
| 1435 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
| 1436 __ bind(L); | |
| 1437 } | |
| 1438 | |
| 1439 // do unlocking if necessary | |
| 1440 { Label L; | |
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1441 __ movl(t, Address(method, Method::access_flags_offset())); |
| 0 | 1442 __ testl(t, JVM_ACC_SYNCHRONIZED); |
| 1443 __ jcc(Assembler::zero, L); | |
| 1444 // the code below should be shared with interpreter macro assembler implementation | |
| 1445 { Label unlock; | |
| 304 | 1446 const Register monitor = NOT_LP64(rdx) LP64_ONLY(c_rarg1); |
| 0 | 1447 // BasicObjectLock will be first in list, since this is a synchronized method. However, need |
| 1448 // to check that the object has not been unlocked by an explicit monitorexit bytecode. | |
| 304 | 1449 __ movptr(monitor, STATE(_monitor_base)); |
| 1450 __ subptr(monitor, frame::interpreter_frame_monitor_size() * wordSize); // address of initial monitor | |
| 1451 | |
| 1452 __ movptr(t, Address(monitor, BasicObjectLock::obj_offset_in_bytes())); | |
| 1453 __ testptr(t, t); | |
| 0 | 1454 __ jcc(Assembler::notZero, unlock); |
| 1455 | |
| 1456 // Entry already unlocked, need to throw exception | |
| 1457 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); | |
| 1458 __ should_not_reach_here(); | |
| 1459 | |
| 1460 __ bind(unlock); | |
| 304 | 1461 __ unlock_object(monitor); |
| 0 | 1462 // unlock can blow rbx so restore it for path that needs it below |
| 304 | 1463 __ movptr(method, STATE(_method)); |
| 0 | 1464 } |
| 1465 __ bind(L); | |
| 1466 } | |
| 1467 | |
| 1468 // jvmti support | |
| 1469 // Note: This must happen _after_ handling/throwing any exceptions since | |
| 1470 // the exception handler code notifies the runtime of method exits | |
| 1471 // too. If this happens before, method entry/exit notifications are | |
| 1472 // not properly paired (was bug - gri 11/22/99). | |
| 1473 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); | |
| 1474 | |
| 1475 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result | |
| 304 | 1476 #ifndef _LP64 |
| 1477 __ pop(rdx); | |
| 1478 #endif // _LP64 | |
| 1479 __ pop(rax); | |
| 1480 __ movptr(t, STATE(_result_handler)); // get result handler | |
| 0 | 1481 __ call(t); // call result handler to convert to tosca form |
| 1482 | |
| 1483 // remove activation | |
| 1484 | |
| 304 | 1485 __ movptr(t, STATE(_sender_sp)); |
| 0 | 1486 |
| 1487 __ leave(); // remove frame anchor | |
| 304 | 1488 __ pop(rdi); // get return address |
| 1489 __ movptr(state, STATE(_prev_link)); // get previous state for return (if c++ interpreter was caller) | |
| 1490 __ mov(rsp, t); // set sp to sender sp | |
| 0 | 1491 __ jmp(rdi); |
| 1492 | |
| 1493 // invocation counter overflow | |
| 1494 if (inc_counter) { | |
| 1495 // Handle overflow of counter and compile method | |
| 1496 __ bind(invocation_counter_overflow); | |
| 1497 generate_counter_overflow(&continue_after_compile); | |
| 1498 } | |
| 1499 | |
| 1500 return entry_point; | |
| 1501 } | |
| 1502 | |
| 1503 // Generate entries that will put a result type index into rcx | |
| 1504 void CppInterpreterGenerator::generate_deopt_handling() { | |
| 1505 | |
| 1506 Label return_from_deopt_common; | |
| 1507 | |
| 1508 // Generate entries that will put a result type index into rcx | |
| 1509 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1510 deopt_frame_manager_return_atos = __ pc(); | |
| 1511 | |
| 1512 // rax is live here | |
| 1513 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_OBJECT)); // Result stub address array index | |
| 1514 __ jmp(return_from_deopt_common); | |
| 1515 | |
| 1516 | |
| 1517 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1518 deopt_frame_manager_return_btos = __ pc(); | |
| 1519 | |
| 1520 // rax is live here | |
| 1521 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_BOOLEAN)); // Result stub address array index | |
| 1522 __ jmp(return_from_deopt_common); | |
| 1523 | |
| 1524 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1525 deopt_frame_manager_return_itos = __ pc(); | |
| 1526 | |
| 1527 // rax is live here | |
| 1528 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_INT)); // Result stub address array index | |
| 1529 __ jmp(return_from_deopt_common); | |
| 1530 | |
| 1531 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1532 | |
| 1533 deopt_frame_manager_return_ltos = __ pc(); | |
| 1534 // rax,rdx are live here | |
| 1535 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_LONG)); // Result stub address array index | |
| 1536 __ jmp(return_from_deopt_common); | |
| 1537 | |
| 1538 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1539 | |
| 1540 deopt_frame_manager_return_ftos = __ pc(); | |
| 1541 // st(0) is live here | |
| 1542 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_FLOAT)); // Result stub address array index | |
| 1543 __ jmp(return_from_deopt_common); | |
| 1544 | |
| 1545 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1546 deopt_frame_manager_return_dtos = __ pc(); | |
| 1547 | |
| 1548 // st(0) is live here | |
| 1549 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); // Result stub address array index | |
| 1550 __ jmp(return_from_deopt_common); | |
| 1551 | |
| 1552 // deopt needs to jump to here to enter the interpreter (return a result) | |
| 1553 deopt_frame_manager_return_vtos = __ pc(); | |
| 1554 | |
| 1555 __ movl(rcx, AbstractInterpreter::BasicType_as_index(T_VOID)); | |
| 1556 | |
| 1557 // Deopt return common | |
| 1558 // an index is present in rcx that lets us move any possible result being | |
| 1559 // return to the interpreter's stack | |
| 1560 // | |
| 1561 // Because we have a full sized interpreter frame on the youngest | |
| 1562 // activation the stack is pushed too deep to share the tosca to | |
| 1563 // stack converters directly. We shrink the stack to the desired | |
| 1564 // amount and then push result and then re-extend the stack. | |
| 1565 // We could have the code in size_activation layout a short | |
| 1566 // frame for the top activation but that would look different | |
| 1567 // than say sparc (which needs a full size activation because | |
| 1568 // the windows are in the way. Really it could be short? QQQ | |
| 1569 // | |
| 1570 __ bind(return_from_deopt_common); | |
| 1571 | |
| 304 | 1572 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
| 0 | 1573 |
| 1574 // setup rsp so we can push the "result" as needed. | |
| 304 | 1575 __ movptr(rsp, STATE(_stack)); // trim stack (is prepushed) |
| 1576 __ addptr(rsp, wordSize); // undo prepush | |
| 0 | 1577 |
| 1578 ExternalAddress tosca_to_stack((address)CppInterpreter::_tosca_to_stack); | |
| 304 | 1579 // Address index(noreg, rcx, Address::times_ptr); |
| 1580 __ movptr(rcx, ArrayAddress(tosca_to_stack, Address(noreg, rcx, Address::times_ptr))); | |
| 1581 // __ movl(rcx, Address(noreg, rcx, Address::times_ptr, int(AbstractInterpreter::_tosca_to_stack))); | |
| 0 | 1582 __ call(rcx); // call result converter |
| 1583 | |
| 1584 __ movl(STATE(_msg), (int)BytecodeInterpreter::deopt_resume); | |
| 304 | 1585 __ lea(rsp, Address(rsp, -wordSize)); // prepush stack (result if any already present) |
| 1586 __ movptr(STATE(_stack), rsp); // inform interpreter of new stack depth (parameters removed, | |
| 0 | 1587 // result if any on stack already ) |
| 304 | 1588 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth |
| 0 | 1589 } |
| 1590 | |
| 1591 // Generate the code to handle a more_monitors message from the c++ interpreter | |
| 1592 void CppInterpreterGenerator::generate_more_monitors() { | |
| 1593 | |
| 1594 | |
| 1595 Label entry, loop; | |
| 1596 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; | |
| 304 | 1597 // 1. compute new pointers // rsp: old expression stack top |
| 1598 __ movptr(rdx, STATE(_stack_base)); // rdx: old expression stack bottom | |
| 1599 __ subptr(rsp, entry_size); // move expression stack top limit | |
| 1600 __ subptr(STATE(_stack), entry_size); // update interpreter stack top | |
| 1601 __ subptr(STATE(_stack_limit), entry_size); // inform interpreter | |
| 1602 __ subptr(rdx, entry_size); // move expression stack bottom | |
| 1603 __ movptr(STATE(_stack_base), rdx); // inform interpreter | |
| 1604 __ movptr(rcx, STATE(_stack)); // set start value for copy loop | |
| 0 | 1605 __ jmp(entry); |
| 1606 // 2. move expression stack contents | |
| 1607 __ bind(loop); | |
| 304 | 1608 __ movptr(rbx, Address(rcx, entry_size)); // load expression stack word from old location |
| 1609 __ movptr(Address(rcx, 0), rbx); // and store it at new location | |
| 1610 __ addptr(rcx, wordSize); // advance to next word | |
| 0 | 1611 __ bind(entry); |
| 304 | 1612 __ cmpptr(rcx, rdx); // check if bottom reached |
| 1613 __ jcc(Assembler::notEqual, loop); // if not at bottom then copy next word | |
| 0 | 1614 // now zero the slot so we can find it. |
| 304 | 1615 __ movptr(Address(rdx, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL_WORD); |
| 0 | 1616 __ movl(STATE(_msg), (int)BytecodeInterpreter::got_monitors); |
| 1617 } | |
| 1618 | |
| 1619 | |
| 1620 // Initial entry to C++ interpreter from the call_stub. | |
| 1621 // This entry point is called the frame manager since it handles the generation | |
| 1622 // of interpreter activation frames via requests directly from the vm (via call_stub) | |
| 1623 // and via requests from the interpreter. The requests from the call_stub happen | |
| 1624 // directly thru the entry point. Requests from the interpreter happen via returning | |
| 1625 // from the interpreter and examining the message the interpreter has returned to | |
| 1626 // the frame manager. The frame manager can take the following requests: | |
| 1627 | |
| 1628 // NO_REQUEST - error, should never happen. | |
| 1629 // MORE_MONITORS - need a new monitor. Shuffle the expression stack on down and | |
| 1630 // allocate a new monitor. | |
| 1631 // CALL_METHOD - setup a new activation to call a new method. Very similar to what | |
| 1632 // happens during entry during the entry via the call stub. | |
| 1633 // RETURN_FROM_METHOD - remove an activation. Return to interpreter or call stub. | |
| 1634 // | |
| 1635 // Arguments: | |
| 1636 // | |
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1637 // rbx: Method* |
| 0 | 1638 // rcx: receiver - unused (retrieved from stack as needed) |
| 304 | 1639 // rsi/r13: previous frame manager state (NULL from the call_stub/c1/c2) |
| 0 | 1640 // |
| 1641 // | |
| 1642 // Stack layout at entry | |
| 1643 // | |
| 1644 // [ return address ] <--- rsp | |
| 1645 // [ parameter n ] | |
| 1646 // ... | |
| 1647 // [ parameter 1 ] | |
| 1648 // [ expression stack ] | |
| 1649 // | |
| 1650 // | |
| 1651 // We are free to blow any registers we like because the call_stub which brought us here | |
| 1652 // initially has preserved the callee save registers already. | |
| 1653 // | |
| 1654 // | |
| 1655 | |
| 1656 static address interpreter_frame_manager = NULL; | |
| 1657 | |
| 1658 address InterpreterGenerator::generate_normal_entry(bool synchronized) { | |
| 1659 | |
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1660 // rbx: Method* |
| 304 | 1661 // rsi/r13: sender sp |
| 0 | 1662 |
| 1663 // Because we redispatch "recursive" interpreter entries thru this same entry point | |
| 1664 // the "input" register usage is a little strange and not what you expect coming | |
| 1665 // from the call_stub. From the call stub rsi/rdi (current/previous) interpreter | |
| 1666 // state are NULL but on "recursive" dispatches they are what you'd expect. | |
| 1667 // rsi: current interpreter state (C++ interpreter) must preserve (null from call_stub/c1/c2) | |
| 1668 | |
| 1669 | |
| 1670 // A single frame manager is plenty as we don't specialize for synchronized. We could and | |
| 1671 // the code is pretty much ready. Would need to change the test below and for good measure | |
| 1672 // modify generate_interpreter_state to only do the (pre) sync stuff stuff for synchronized | |
| 1673 // routines. Not clear this is worth it yet. | |
| 1674 | |
| 1675 if (interpreter_frame_manager) return interpreter_frame_manager; | |
| 1676 | |
| 1677 address entry_point = __ pc(); | |
| 1678 | |
| 1679 // Fast accessor methods share this entry point. | |
| 1680 // This works because frame manager is in the same codelet | |
| 1681 if (UseFastAccessorMethods && !synchronized) __ bind(fast_accessor_slow_entry_path); | |
| 1682 | |
| 1683 Label dispatch_entry_2; | |
| 304 | 1684 __ movptr(rcx, sender_sp_on_entry); |
| 1685 __ movptr(state, (int32_t)NULL_WORD); // no current activation | |
| 0 | 1686 |
| 1687 __ jmp(dispatch_entry_2); | |
| 1688 | |
| 1689 const Register locals = rdi; | |
| 1690 | |
| 1691 Label re_dispatch; | |
| 1692 | |
| 1693 __ bind(re_dispatch); | |
| 1694 | |
| 1695 // save sender sp (doesn't include return address | |
| 304 | 1696 __ lea(rcx, Address(rsp, wordSize)); |
| 0 | 1697 |
| 1698 __ bind(dispatch_entry_2); | |
| 1699 | |
| 1700 // save sender sp | |
| 304 | 1701 __ push(rcx); |
| 0 | 1702 |
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1703 const Address size_of_parameters(rbx, Method::size_of_parameters_offset()); |
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1704 const Address size_of_locals (rbx, Method::size_of_locals_offset()); |
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1705 const Address access_flags (rbx, Method::access_flags_offset()); |
| 0 | 1706 |
| 1707 // const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize); | |
| 1708 // const Address monitor_block_bot (rbp, frame::interpreter_frame_initial_sp_offset * wordSize); | |
| 1709 // const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock)); | |
| 1710 | |
| 1711 // get parameter size (always needed) | |
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1712 __ load_unsigned_short(rcx, size_of_parameters); |
| 0 | 1713 |
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1714 // rbx: Method* |
| 0 | 1715 // rcx: size of parameters |
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1716 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words |
| 0 | 1717 |
| 304 | 1718 __ subptr(rdx, rcx); // rdx = no. of additional locals |
| 0 | 1719 |
| 1720 // see if we've got enough room on the stack for locals plus overhead. | |
| 1721 generate_stack_overflow_check(); // C++ | |
| 1722 | |
| 1723 // c++ interpreter does not use stack banging or any implicit exceptions | |
| 1724 // leave for now to verify that check is proper. | |
| 1725 bang_stack_shadow_pages(false); | |
| 1726 | |
| 1727 | |
| 1728 | |
| 1729 // compute beginning of parameters (rdi) | |
| 304 | 1730 __ lea(locals, Address(rsp, rcx, Address::times_ptr, wordSize)); |
| 0 | 1731 |
| 1732 // save sender's sp | |
| 1733 // __ movl(rcx, rsp); | |
| 1734 | |
| 1735 // get sender's sp | |
| 304 | 1736 __ pop(rcx); |
| 0 | 1737 |
| 1738 // get return address | |
| 304 | 1739 __ pop(rax); |
| 0 | 1740 |
| 1741 // rdx - # of additional locals | |
| 1742 // allocate space for locals | |
| 1743 // explicitly initialize locals | |
| 1744 { | |
| 1745 Label exit, loop; | |
| 304 | 1746 __ testl(rdx, rdx); // (32bit ok) |
| 0 | 1747 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 |
| 1748 __ bind(loop); | |
| 304 | 1749 __ push((int32_t)NULL_WORD); // initialize local variables |
| 0 | 1750 __ decrement(rdx); // until everything initialized |
| 1751 __ jcc(Assembler::greater, loop); | |
| 1752 __ bind(exit); | |
| 1753 } | |
| 1754 | |
| 1755 | |
| 1756 // Assumes rax = return address | |
| 1757 | |
| 1758 // allocate and initialize new interpreterState and method expression stack | |
| 1759 // IN(locals) -> locals | |
| 1760 // IN(state) -> any current interpreter activation | |
| 1761 // destroys rax, rcx, rdx, rdi | |
| 1762 // OUT (state) -> new interpreterState | |
| 1763 // OUT(rsp) -> bottom of methods expression stack | |
| 1764 | |
| 1765 generate_compute_interpreter_state(state, locals, rcx, false); | |
| 1766 | |
| 1767 // Call interpreter | |
| 1768 | |
| 1769 Label call_interpreter; | |
| 1770 __ bind(call_interpreter); | |
| 1771 | |
| 1772 // c++ interpreter does not use stack banging or any implicit exceptions | |
| 1773 // leave for now to verify that check is proper. | |
| 1774 bang_stack_shadow_pages(false); | |
| 1775 | |
| 1776 | |
| 1777 // Call interpreter enter here if message is | |
| 1778 // set and we know stack size is valid | |
| 1779 | |
| 1780 Label call_interpreter_2; | |
| 1781 | |
| 1782 __ bind(call_interpreter_2); | |
| 1783 | |
| 1784 { | |
| 304 | 1785 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); |
| 1786 | |
| 1787 #ifdef _LP64 | |
| 1788 __ mov(c_rarg0, state); | |
| 1789 #else | |
| 1790 __ push(state); // push arg to interpreter | |
| 1791 __ movptr(thread, STATE(_thread)); | |
| 1792 #endif // _LP64 | |
| 0 | 1793 |
| 1794 // We can setup the frame anchor with everything we want at this point | |
| 1795 // as we are thread_in_Java and no safepoints can occur until we go to | |
| 1796 // vm mode. We do have to clear flags on return from vm but that is it | |
| 1797 // | |
| 304 | 1798 __ movptr(Address(thread, JavaThread::last_Java_fp_offset()), rbp); |
| 1799 __ movptr(Address(thread, JavaThread::last_Java_sp_offset()), rsp); | |
| 0 | 1800 |
| 1801 // Call the interpreter | |
| 1802 | |
| 1803 RuntimeAddress normal(CAST_FROM_FN_PTR(address, BytecodeInterpreter::run)); | |
| 1804 RuntimeAddress checking(CAST_FROM_FN_PTR(address, BytecodeInterpreter::runWithChecks)); | |
| 1805 | |
| 1806 __ call(JvmtiExport::can_post_interpreter_events() ? checking : normal); | |
| 304 | 1807 NOT_LP64(__ pop(rax);) // discard parameter to run |
| 0 | 1808 // |
| 1809 // state is preserved since it is callee saved | |
| 1810 // | |
| 1811 | |
| 1812 // reset_last_Java_frame | |
| 1813 | |
| 304 | 1814 NOT_LP64(__ movl(thread, STATE(_thread));) |
| 0 | 1815 __ reset_last_Java_frame(thread, true, true); |
| 1816 } | |
| 1817 | |
| 1818 // examine msg from interpreter to determine next action | |
| 1819 | |
| 1820 __ movl(rdx, STATE(_msg)); // Get new message | |
| 1821 | |
| 1822 Label call_method; | |
| 1823 Label return_from_interpreted_method; | |
| 1824 Label throw_exception; | |
| 1825 Label bad_msg; | |
| 1826 Label do_OSR; | |
| 1827 | |
| 304 | 1828 __ cmpl(rdx, (int32_t)BytecodeInterpreter::call_method); |
| 0 | 1829 __ jcc(Assembler::equal, call_method); |
| 304 | 1830 __ cmpl(rdx, (int32_t)BytecodeInterpreter::return_from_method); |
| 0 | 1831 __ jcc(Assembler::equal, return_from_interpreted_method); |
| 304 | 1832 __ cmpl(rdx, (int32_t)BytecodeInterpreter::do_osr); |
| 0 | 1833 __ jcc(Assembler::equal, do_OSR); |
| 304 | 1834 __ cmpl(rdx, (int32_t)BytecodeInterpreter::throwing_exception); |
| 0 | 1835 __ jcc(Assembler::equal, throw_exception); |
| 304 | 1836 __ cmpl(rdx, (int32_t)BytecodeInterpreter::more_monitors); |
| 0 | 1837 __ jcc(Assembler::notEqual, bad_msg); |
| 1838 | |
| 1839 // Allocate more monitor space, shuffle expression stack.... | |
| 1840 | |
| 1841 generate_more_monitors(); | |
| 1842 | |
| 1843 __ jmp(call_interpreter); | |
| 1844 | |
| 1845 // uncommon trap needs to jump to here to enter the interpreter (re-execute current bytecode) | |
| 1846 unctrap_frame_manager_entry = __ pc(); | |
| 1847 // | |
| 1848 // Load the registers we need. | |
| 304 | 1849 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
| 1850 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth | |
| 0 | 1851 __ jmp(call_interpreter_2); |
| 1852 | |
| 1853 | |
| 1854 | |
| 1855 //============================================================================= | |
| 1856 // Returning from a compiled method into a deopted method. The bytecode at the | |
| 1857 // bcp has completed. The result of the bytecode is in the native abi (the tosca | |
| 1858 // for the template based interpreter). Any stack space that was used by the | |
| 1859 // bytecode that has completed has been removed (e.g. parameters for an invoke) | |
| 1860 // so all that we have to do is place any pending result on the expression stack | |
| 1861 // and resume execution on the next bytecode. | |
| 1862 | |
| 1863 | |
| 1864 generate_deopt_handling(); | |
| 1865 __ jmp(call_interpreter); | |
| 1866 | |
| 1867 | |
| 1868 // Current frame has caught an exception we need to dispatch to the | |
| 1869 // handler. We can get here because a native interpreter frame caught | |
| 1870 // an exception in which case there is no handler and we must rethrow | |
| 1871 // If it is a vanilla interpreted frame the we simply drop into the | |
| 1872 // interpreter and let it do the lookup. | |
| 1873 | |
| 1874 Interpreter::_rethrow_exception_entry = __ pc(); | |
| 1875 // rax: exception | |
| 1876 // rdx: return address/pc that threw exception | |
| 1877 | |
| 1878 Label return_with_exception; | |
| 1879 Label unwind_and_forward; | |
| 1880 | |
| 1881 // restore state pointer. | |
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1882 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
| 304 | 1883 |
| 1884 __ movptr(rbx, STATE(_method)); // get method | |
| 1885 #ifdef _LP64 | |
| 1886 __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax); | |
| 1887 #else | |
| 0 | 1888 __ movl(rcx, STATE(_thread)); // get thread |
| 1889 | |
| 1890 // Store exception with interpreter will expect it | |
| 304 | 1891 __ movptr(Address(rcx, Thread::pending_exception_offset()), rax); |
| 1892 #endif // _LP64 | |
| 0 | 1893 |
| 1894 // is current frame vanilla or native? | |
| 1895 | |
| 1896 __ movl(rdx, access_flags); | |
| 1897 __ testl(rdx, JVM_ACC_NATIVE); | |
| 1898 __ jcc(Assembler::zero, return_with_exception); // vanilla interpreted frame, handle directly | |
| 1899 | |
| 1900 // We drop thru to unwind a native interpreted frame with a pending exception | |
| 1901 // We jump here for the initial interpreter frame with exception pending | |
| 1902 // We unwind the current acivation and forward it to our caller. | |
| 1903 | |
| 1904 __ bind(unwind_and_forward); | |
| 1905 | |
| 1906 // unwind rbp, return stack to unextended value and re-push return address | |
| 1907 | |
| 304 | 1908 __ movptr(rcx, STATE(_sender_sp)); |
| 0 | 1909 __ leave(); |
| 304 | 1910 __ pop(rdx); |
| 1911 __ mov(rsp, rcx); | |
| 1912 __ push(rdx); | |
| 0 | 1913 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| 1914 | |
| 1915 // Return point from a call which returns a result in the native abi | |
| 1916 // (c1/c2/jni-native). This result must be processed onto the java | |
| 1917 // expression stack. | |
| 1918 // | |
| 1919 // A pending exception may be present in which case there is no result present | |
| 1920 | |
| 1921 Label resume_interpreter; | |
| 1922 Label do_float; | |
| 1923 Label do_double; | |
| 1924 Label done_conv; | |
| 1925 | |
| 1926 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases | |
| 1927 if (UseSSE < 2) { | |
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1928 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
| 304 | 1929 __ movptr(rbx, STATE(_result._to_call._callee)); // get method just executed |
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1930 __ movl(rcx, Address(rbx, Method::result_index_offset())); |
| 0 | 1931 __ cmpl(rcx, AbstractInterpreter::BasicType_as_index(T_FLOAT)); // Result stub address array index |
| 1932 __ jcc(Assembler::equal, do_float); | |
| 1933 __ cmpl(rcx, AbstractInterpreter::BasicType_as_index(T_DOUBLE)); // Result stub address array index | |
| 1934 __ jcc(Assembler::equal, do_double); | |
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1935 #if !defined(_LP64) || defined(COMPILER1) || !defined(COMPILER2) |
| 0 | 1936 __ empty_FPU_stack(); |
| 1937 #endif // COMPILER2 | |
| 1938 __ jmp(done_conv); | |
| 1939 | |
| 1940 __ bind(do_float); | |
| 1941 #ifdef COMPILER2 | |
| 1942 for (int i = 1; i < 8; i++) { | |
| 1943 __ ffree(i); | |
| 1944 } | |
| 1945 #endif // COMPILER2 | |
| 1946 __ jmp(done_conv); | |
| 1947 __ bind(do_double); | |
| 1948 #ifdef COMPILER2 | |
| 1949 for (int i = 1; i < 8; i++) { | |
| 1950 __ ffree(i); | |
| 1951 } | |
| 1952 #endif // COMPILER2 | |
| 1953 __ jmp(done_conv); | |
| 1954 } else { | |
| 1955 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); | |
| 1956 __ jmp(done_conv); | |
| 1957 } | |
| 1958 | |
| 1959 // Return point to interpreter from compiled/native method | |
| 1960 InternalAddress return_from_native_method(__ pc()); | |
| 1961 | |
| 1962 __ bind(done_conv); | |
| 1963 | |
| 1964 | |
| 1965 // Result if any is in tosca. The java expression stack is in the state that the | |
| 1966 // calling convention left it (i.e. params may or may not be present) | |
| 1967 // Copy the result from tosca and place it on java expression stack. | |
| 1968 | |
| 304 | 1969 // Restore rsi/r13 as compiled code may not preserve it |
| 1970 | |
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1971 __ lea(state, Address(rbp, -(int)sizeof(BytecodeInterpreter))); |
| 0 | 1972 |
| 1973 // restore stack to what we had when we left (in case i2c extended it) | |
| 1974 | |
| 304 | 1975 __ movptr(rsp, STATE(_stack)); |
| 1976 __ lea(rsp, Address(rsp, wordSize)); | |
| 0 | 1977 |
| 1978 // If there is a pending exception then we don't really have a result to process | |
| 1979 | |
| 304 | 1980 #ifdef _LP64 |
| 1981 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
| 1982 #else | |
| 1983 __ movptr(rcx, STATE(_thread)); // get thread | |
| 1984 __ cmpptr(Address(rcx, Thread::pending_exception_offset()), (int32_t)NULL_WORD); | |
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1985 #endif // _LP64 |
| 0 | 1986 __ jcc(Assembler::notZero, return_with_exception); |
| 1987 | |
| 1988 // get method just executed | |
| 304 | 1989 __ movptr(rbx, STATE(_result._to_call._callee)); |
| 0 | 1990 |
| 1991 // callee left args on top of expression stack, remove them | |
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1992 __ load_unsigned_short(rcx, Address(rbx, Method::size_of_parameters_offset())); |
| 304 | 1993 __ lea(rsp, Address(rsp, rcx, Address::times_ptr)); |
| 0 | 1994 |
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1995 __ movl(rcx, Address(rbx, Method::result_index_offset())); |
| 0 | 1996 ExternalAddress tosca_to_stack((address)CppInterpreter::_tosca_to_stack); |
| 304 | 1997 // Address index(noreg, rax, Address::times_ptr); |
| 1998 __ movptr(rcx, ArrayAddress(tosca_to_stack, Address(noreg, rcx, Address::times_ptr))); | |
| 1999 // __ movl(rcx, Address(noreg, rcx, Address::times_ptr, int(AbstractInterpreter::_tosca_to_stack))); | |
| 0 | 2000 __ call(rcx); // call result converter |
| 2001 __ jmp(resume_interpreter); | |
| 2002 | |
| 2003 // An exception is being caught on return to a vanilla interpreter frame. | |
| 2004 // Empty the stack and resume interpreter | |
| 2005 | |
| 2006 __ bind(return_with_exception); | |
| 2007 | |
| 2008 // Exception present, empty stack | |
| 304 | 2009 __ movptr(rsp, STATE(_stack_base)); |
| 0 | 2010 __ jmp(resume_interpreter); |
| 2011 | |
| 2012 // Return from interpreted method we return result appropriate to the caller (i.e. "recursive" | |
| 2013 // interpreter call, or native) and unwind this interpreter activation. | |
| 2014 // All monitors should be unlocked. | |
| 2015 | |
| 2016 __ bind(return_from_interpreted_method); | |
| 2017 | |
| 2018 Label return_to_initial_caller; | |
| 2019 | |
| 304 | 2020 __ movptr(rbx, STATE(_method)); // get method just executed |
| 2021 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from "recursive" interpreter call? | |
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2022 __ movl(rax, Address(rbx, Method::result_index_offset())); // get result type index |
| 0 | 2023 __ jcc(Assembler::equal, return_to_initial_caller); // back to native code (call_stub/c1/c2) |
| 2024 | |
| 2025 // Copy result to callers java stack | |
| 2026 ExternalAddress stack_to_stack((address)CppInterpreter::_stack_to_stack); | |
| 304 | 2027 // Address index(noreg, rax, Address::times_ptr); |
| 2028 | |
| 2029 __ movptr(rax, ArrayAddress(stack_to_stack, Address(noreg, rax, Address::times_ptr))); | |
| 2030 // __ movl(rax, Address(noreg, rax, Address::times_ptr, int(AbstractInterpreter::_stack_to_stack))); | |
| 0 | 2031 __ call(rax); // call result converter |
| 2032 | |
| 2033 Label unwind_recursive_activation; | |
| 2034 __ bind(unwind_recursive_activation); | |
| 2035 | |
| 2036 // returning to interpreter method from "recursive" interpreter call | |
| 2037 // result converter left rax pointing to top of the java stack for method we are returning | |
| 2038 // to. Now all we must do is unwind the state from the completed call | |
| 2039 | |
| 304 | 2040 __ movptr(state, STATE(_prev_link)); // unwind state |
| 0 | 2041 __ leave(); // pop the frame |
| 304 | 2042 __ mov(rsp, rax); // unwind stack to remove args |
| 0 | 2043 |
| 2044 // Resume the interpreter. The current frame contains the current interpreter | |
| 2045 // state object. | |
| 2046 // | |
| 2047 | |
| 2048 __ bind(resume_interpreter); | |
| 2049 | |
| 2050 // state == interpreterState object for method we are resuming | |
| 2051 | |
| 2052 __ movl(STATE(_msg), (int)BytecodeInterpreter::method_resume); | |
| 304 | 2053 __ lea(rsp, Address(rsp, -wordSize)); // prepush stack (result if any already present) |
| 2054 __ movptr(STATE(_stack), rsp); // inform interpreter of new stack depth (parameters removed, | |
| 0 | 2055 // result if any on stack already ) |
| 304 | 2056 __ movptr(rsp, STATE(_stack_limit)); // restore expression stack to full depth |
| 0 | 2057 __ jmp(call_interpreter_2); // No need to bang |
| 2058 | |
| 2059 // interpreter returning to native code (call_stub/c1/c2) | |
| 2060 // convert result and unwind initial activation | |
| 2061 // rax - result index | |
| 2062 | |
| 2063 __ bind(return_to_initial_caller); | |
| 2064 ExternalAddress stack_to_native((address)CppInterpreter::_stack_to_native_abi); | |
| 304 | 2065 // Address index(noreg, rax, Address::times_ptr); |
| 2066 | |
| 2067 __ movptr(rax, ArrayAddress(stack_to_native, Address(noreg, rax, Address::times_ptr))); | |
| 0 | 2068 __ call(rax); // call result converter |
| 2069 | |
| 2070 Label unwind_initial_activation; | |
| 2071 __ bind(unwind_initial_activation); | |
| 2072 | |
| 2073 // RETURN TO CALL_STUB/C1/C2 code (result if any in rax/rdx ST(0)) | |
| 2074 | |
| 2075 /* Current stack picture | |
| 2076 | |
| 2077 [ incoming parameters ] | |
| 2078 [ extra locals ] | |
| 2079 [ return address to CALL_STUB/C1/C2] | |
| 2080 fp -> [ CALL_STUB/C1/C2 fp ] | |
| 2081 BytecodeInterpreter object | |
| 2082 expression stack | |
| 2083 sp -> | |
| 2084 | |
| 2085 */ | |
| 2086 | |
| 2087 // return restoring the stack to the original sender_sp value | |
| 2088 | |
| 304 | 2089 __ movptr(rcx, STATE(_sender_sp)); |
| 0 | 2090 __ leave(); |
| 304 | 2091 __ pop(rdi); // get return address |
| 0 | 2092 // set stack to sender's sp |
| 304 | 2093 __ mov(rsp, rcx); |
| 0 | 2094 __ jmp(rdi); // return to call_stub |
| 2095 | |
| 2096 // OSR request, adjust return address to make current frame into adapter frame | |
| 2097 // and enter OSR nmethod | |
| 2098 | |
| 2099 __ bind(do_OSR); | |
| 2100 | |
| 2101 Label remove_initial_frame; | |
| 2102 | |
| 2103 // We are going to pop this frame. Is there another interpreter frame underneath | |
| 2104 // it or is it callstub/compiled? | |
| 2105 | |
| 2106 // Move buffer to the expected parameter location | |
| 304 | 2107 __ movptr(rcx, STATE(_result._osr._osr_buf)); |
| 2108 | |
| 2109 __ movptr(rax, STATE(_result._osr._osr_entry)); | |
| 2110 | |
| 2111 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from "recursive" interpreter call? | |
| 0 | 2112 __ jcc(Assembler::equal, remove_initial_frame); // back to native code (call_stub/c1/c2) |
| 2113 | |
| 304 | 2114 __ movptr(sender_sp_on_entry, STATE(_sender_sp)); // get sender's sp in expected register |
| 0 | 2115 __ leave(); // pop the frame |
| 304 | 2116 __ mov(rsp, sender_sp_on_entry); // trim any stack expansion |
| 0 | 2117 |
| 2118 | |
| 2119 // We know we are calling compiled so push specialized return | |
| 2120 // method uses specialized entry, push a return so we look like call stub setup | |
| 2121 // this path will handle fact that result is returned in registers and not | |
| 2122 // on the java stack. | |
| 2123 | |
| 2124 __ pushptr(return_from_native_method.addr()); | |
| 2125 | |
| 2126 __ jmp(rax); | |
| 2127 | |
| 2128 __ bind(remove_initial_frame); | |
| 2129 | |
| 304 | 2130 __ movptr(rdx, STATE(_sender_sp)); |
| 0 | 2131 __ leave(); |
| 2132 // get real return | |
| 304 | 2133 __ pop(rsi); |
| 0 | 2134 // set stack to sender's sp |
| 304 | 2135 __ mov(rsp, rdx); |
| 0 | 2136 // repush real return |
| 304 | 2137 __ push(rsi); |
| 0 | 2138 // Enter OSR nmethod |
| 2139 __ jmp(rax); | |
| 2140 | |
| 2141 | |
| 2142 | |
| 2143 | |
| 2144 // Call a new method. All we do is (temporarily) trim the expression stack | |
| 2145 // push a return address to bring us back to here and leap to the new entry. | |
| 2146 | |
| 2147 __ bind(call_method); | |
| 2148 | |
| 2149 // stack points to next free location and not top element on expression stack | |
| 2150 // method expects sp to be pointing to topmost element | |
| 2151 | |
| 304 | 2152 __ movptr(rsp, STATE(_stack)); // pop args to c++ interpreter, set sp to java stack top |
| 2153 __ lea(rsp, Address(rsp, wordSize)); | |
| 2154 | |
| 2155 __ movptr(rbx, STATE(_result._to_call._callee)); // get method to execute | |
| 0 | 2156 |
| 2157 // don't need a return address if reinvoking interpreter | |
| 2158 | |
| 2159 // Make it look like call_stub calling conventions | |
| 2160 | |
| 2161 // Get (potential) receiver | |
|
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2162 __ load_unsigned_short(rcx, size_of_parameters); // get size of parameters in words |
| 0 | 2163 |
| 2164 ExternalAddress recursive(CAST_FROM_FN_PTR(address, RecursiveInterpreterActivation)); | |
| 2165 __ pushptr(recursive.addr()); // make it look good in the debugger | |
| 2166 | |
| 2167 InternalAddress entry(entry_point); | |
| 2168 __ cmpptr(STATE(_result._to_call._callee_entry_point), entry.addr()); // returning to interpreter? | |
| 2169 __ jcc(Assembler::equal, re_dispatch); // yes | |
| 2170 | |
| 304 | 2171 __ pop(rax); // pop dummy address |
| 0 | 2172 |
| 2173 | |
| 2174 // get specialized entry | |
| 304 | 2175 __ movptr(rax, STATE(_result._to_call._callee_entry_point)); |
| 0 | 2176 // set sender SP |
| 304 | 2177 __ mov(sender_sp_on_entry, rsp); |
| 0 | 2178 |
| 2179 // method uses specialized entry, push a return so we look like call stub setup | |
| 2180 // this path will handle fact that result is returned in registers and not | |
| 2181 // on the java stack. | |
| 2182 | |
| 2183 __ pushptr(return_from_native_method.addr()); | |
| 2184 | |
| 2185 __ jmp(rax); | |
| 2186 | |
| 2187 __ bind(bad_msg); | |
| 2188 __ stop("Bad message from interpreter"); | |
| 2189 | |
| 2190 // Interpreted method "returned" with an exception pass it on... | |
| 2191 // Pass result, unwind activation and continue/return to interpreter/call_stub | |
| 2192 // We handle result (if any) differently based on return to interpreter or call_stub | |
| 2193 | |
| 2194 Label unwind_initial_with_pending_exception; | |
| 2195 | |
| 2196 __ bind(throw_exception); | |
| 304 | 2197 __ cmpptr(STATE(_prev_link), (int32_t)NULL_WORD); // returning from recursive interpreter call? |
| 0 | 2198 __ jcc(Assembler::equal, unwind_initial_with_pending_exception); // no, back to native code (call_stub/c1/c2) |
| 304 | 2199 __ movptr(rax, STATE(_locals)); // pop parameters get new stack value |
| 2200 __ addptr(rax, wordSize); // account for prepush before we return | |
| 0 | 2201 __ jmp(unwind_recursive_activation); |
| 2202 | |
| 2203 __ bind(unwind_initial_with_pending_exception); | |
| 2204 | |
| 2205 // We will unwind the current (initial) interpreter frame and forward | |
| 2206 // the exception to the caller. We must put the exception in the | |
| 2207 // expected register and clear pending exception and then forward. | |
| 2208 | |
| 2209 __ jmp(unwind_and_forward); | |
| 2210 | |
| 2211 interpreter_frame_manager = entry_point; | |
| 2212 return entry_point; | |
| 2213 } | |
| 2214 | |
| 2215 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) { | |
| 2216 // determine code generation flags | |
| 2217 bool synchronized = false; | |
| 2218 address entry_point = NULL; | |
| 2219 | |
| 2220 switch (kind) { | |
| 2221 case Interpreter::zerolocals : break; | |
| 2222 case Interpreter::zerolocals_synchronized: synchronized = true; break; | |
| 2223 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break; | |
| 2224 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break; | |
| 2225 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break; | |
| 2226 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break; | |
| 2227 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break; | |
| 710 | 2228 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*)this)->generate_method_handle_entry(); break; |
| 0 | 2229 |
| 2230 case Interpreter::java_lang_math_sin : // fall thru | |
| 2231 case Interpreter::java_lang_math_cos : // fall thru | |
| 2232 case Interpreter::java_lang_math_tan : // fall thru | |
| 2233 case Interpreter::java_lang_math_abs : // fall thru | |
| 2234 case Interpreter::java_lang_math_log : // fall thru | |
| 2235 case Interpreter::java_lang_math_log10 : // fall thru | |
| 2236 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break; | |
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2237 case Interpreter::java_lang_ref_reference_get |
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2238 : entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break; |
| 0 | 2239 default : ShouldNotReachHere(); break; |
| 2240 } | |
| 2241 | |
| 2242 if (entry_point) return entry_point; | |
| 2243 | |
| 2244 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized); | |
| 2245 | |
| 2246 } | |
| 2247 | |
| 2248 InterpreterGenerator::InterpreterGenerator(StubQueue* code) | |
| 2249 : CppInterpreterGenerator(code) { | |
| 2250 generate_all(); // down here so it can be "virtual" | |
| 2251 } | |
| 2252 | |
| 2253 // Deoptimization helpers for C++ interpreter | |
| 2254 | |
| 2255 // How much stack a method activation needs in words. | |
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2256 int AbstractInterpreter::size_top_interpreter_activation(Method* method) { |
| 0 | 2257 |
| 2258 const int stub_code = 4; // see generate_call_stub | |
| 2259 // Save space for one monitor to get into the interpreted method in case | |
| 2260 // the method is synchronized | |
| 2261 int monitor_size = method->is_synchronized() ? | |
| 2262 1*frame::interpreter_frame_monitor_size() : 0; | |
| 2263 | |
| 2264 // total static overhead size. Account for interpreter state object, return | |
| 2265 // address, saved rbp and 2 words for a "static long no_params() method" issue. | |
| 2266 | |
| 2267 const int overhead_size = sizeof(BytecodeInterpreter)/wordSize + | |
| 2268 ( frame::sender_sp_offset - frame::link_offset) + 2; | |
| 2269 | |
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2270 const int extra_stack = 0; //6815692//Method::extra_stack_entries(); |
| 710 | 2271 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) * |
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2272 Interpreter::stackElementWords; |
| 0 | 2273 return overhead_size + method_stack + stub_code; |
| 2274 } | |
| 2275 | |
| 2276 // returns the activation size. | |
| 2277 static int size_activation_helper(int extra_locals_size, int monitor_size) { | |
| 2278 return (extra_locals_size + // the addition space for locals | |
| 2279 2*BytesPerWord + // return address and saved rbp | |
| 2280 2*BytesPerWord + // "static long no_params() method" issue | |
| 2281 sizeof(BytecodeInterpreter) + // interpreterState | |
| 2282 monitor_size); // monitors | |
| 2283 } | |
| 2284 | |
| 2285 void BytecodeInterpreter::layout_interpreterState(interpreterState to_fill, | |
| 2286 frame* caller, | |
| 2287 frame* current, | |
|
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2288 Method* method, |
| 0 | 2289 intptr_t* locals, |
| 2290 intptr_t* stack, | |
| 2291 intptr_t* stack_base, | |
| 2292 intptr_t* monitor_base, | |
| 2293 intptr_t* frame_bottom, | |
| 2294 bool is_top_frame | |
| 2295 ) | |
| 2296 { | |
| 2297 // What about any vtable? | |
| 2298 // | |
| 2299 to_fill->_thread = JavaThread::current(); | |
| 2300 // This gets filled in later but make it something recognizable for now | |
| 2301 to_fill->_bcp = method->code_base(); | |
| 2302 to_fill->_locals = locals; | |
| 2303 to_fill->_constants = method->constants()->cache(); | |
| 2304 to_fill->_method = method; | |
| 2305 to_fill->_mdx = NULL; | |
| 2306 to_fill->_stack = stack; | |
| 2307 if (is_top_frame && JavaThread::current()->popframe_forcing_deopt_reexecution() ) { | |
| 2308 to_fill->_msg = deopt_resume2; | |
| 2309 } else { | |
| 2310 to_fill->_msg = method_resume; | |
| 2311 } | |
| 2312 to_fill->_result._to_call._bcp_advance = 0; | |
| 2313 to_fill->_result._to_call._callee_entry_point = NULL; // doesn't matter to anyone | |
| 2314 to_fill->_result._to_call._callee = NULL; // doesn't matter to anyone | |
| 2315 to_fill->_prev_link = NULL; | |
| 2316 | |
| 2317 to_fill->_sender_sp = caller->unextended_sp(); | |
| 2318 | |
| 2319 if (caller->is_interpreted_frame()) { | |
| 2320 interpreterState prev = caller->get_interpreterState(); | |
| 2321 to_fill->_prev_link = prev; | |
| 2322 // *current->register_addr(GR_Iprev_state) = (intptr_t) prev; | |
| 2323 // Make the prev callee look proper | |
| 2324 prev->_result._to_call._callee = method; | |
| 2325 if (*prev->_bcp == Bytecodes::_invokeinterface) { | |
| 2326 prev->_result._to_call._bcp_advance = 5; | |
| 2327 } else { | |
| 2328 prev->_result._to_call._bcp_advance = 3; | |
| 2329 } | |
| 2330 } | |
| 2331 to_fill->_oop_temp = NULL; | |
| 2332 to_fill->_stack_base = stack_base; | |
| 2333 // Need +1 here because stack_base points to the word just above the first expr stack entry | |
| 2334 // and stack_limit is supposed to point to the word just below the last expr stack entry. | |
| 2335 // See generate_compute_interpreter_state. | |
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2336 int extra_stack = 0; //6815692//Method::extra_stack_entries(); |
| 710 | 2337 to_fill->_stack_limit = stack_base - (method->max_stack() + extra_stack + 1); |
| 0 | 2338 to_fill->_monitor_base = (BasicObjectLock*) monitor_base; |
| 2339 | |
| 2340 to_fill->_self_link = to_fill; | |
| 2341 assert(stack >= to_fill->_stack_limit && stack < to_fill->_stack_base, | |
| 2342 "Stack top out of range"); | |
| 2343 } | |
| 2344 | |
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2345 int AbstractInterpreter::layout_activation(Method* method, |
|
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2346 int tempcount, // |
|
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2347 int popframe_extra_args, |
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2348 int moncount, |
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2349 int caller_actual_parameters, |
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2350 int callee_param_count, |
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2351 int callee_locals, |
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2352 frame* caller, |
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2353 frame* interpreter_frame, |
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2354 bool is_top_frame) { |
| 0 | 2355 |
| 2356 assert(popframe_extra_args == 0, "FIX ME"); | |
| 2357 // NOTE this code must exactly mimic what InterpreterGenerator::generate_compute_interpreter_state() | |
| 2358 // does as far as allocating an interpreter frame. | |
| 2359 // If interpreter_frame!=NULL, set up the method, locals, and monitors. | |
| 2360 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size, | |
| 2361 // as determined by a previous call to this method. | |
| 2362 // It is also guaranteed to be walkable even though it is in a skeletal state | |
| 2363 // NOTE: return size is in words not bytes | |
| 2364 // NOTE: tempcount is the current size of the java expression stack. For top most | |
| 2365 // frames we will allocate a full sized expression stack and not the curback | |
| 2366 // version that non-top frames have. | |
| 2367 | |
| 2368 // Calculate the amount our frame will be adjust by the callee. For top frame | |
| 2369 // this is zero. | |
| 2370 | |
| 2371 // NOTE: ia64 seems to do this wrong (or at least backwards) in that it | |
| 2372 // calculates the extra locals based on itself. Not what the callee does | |
| 2373 // to it. So it ignores last_frame_adjust value. Seems suspicious as far | |
| 2374 // as getting sender_sp correct. | |
| 2375 | |
| 2376 int extra_locals_size = (callee_locals - callee_param_count) * BytesPerWord; | |
| 2377 int monitor_size = sizeof(BasicObjectLock) * moncount; | |
| 2378 | |
| 2379 // First calculate the frame size without any java expression stack | |
| 2380 int short_frame_size = size_activation_helper(extra_locals_size, | |
| 2381 monitor_size); | |
| 2382 | |
| 2383 // Now with full size expression stack | |
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2384 int extra_stack = 0; //6815692//Method::extra_stack_entries(); |
| 710 | 2385 int full_frame_size = short_frame_size + (method->max_stack() + extra_stack) * BytesPerWord; |
| 0 | 2386 |
| 2387 // and now with only live portion of the expression stack | |
| 2388 short_frame_size = short_frame_size + tempcount * BytesPerWord; | |
| 2389 | |
| 2390 // the size the activation is right now. Only top frame is full size | |
| 2391 int frame_size = (is_top_frame ? full_frame_size : short_frame_size); | |
| 2392 | |
| 2393 if (interpreter_frame != NULL) { | |
| 2394 #ifdef ASSERT | |
| 2395 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable"); | |
| 2396 #endif | |
| 2397 | |
| 2398 // MUCHO HACK | |
| 2399 | |
| 2400 intptr_t* frame_bottom = (intptr_t*) ((intptr_t)interpreter_frame->sp() - (full_frame_size - frame_size)); | |
| 2401 | |
| 2402 /* Now fillin the interpreterState object */ | |
| 2403 | |
| 2404 // The state object is the first thing on the frame and easily located | |
| 2405 | |
| 2406 interpreterState cur_state = (interpreterState) ((intptr_t)interpreter_frame->fp() - sizeof(BytecodeInterpreter)); | |
| 2407 | |
| 2408 | |
| 2409 // Find the locals pointer. This is rather simple on x86 because there is no | |
| 2410 // confusing rounding at the callee to account for. We can trivially locate | |
| 2411 // our locals based on the current fp(). | |
| 2412 // Note: the + 2 is for handling the "static long no_params() method" issue. | |
| 2413 // (too bad I don't really remember that issue well...) | |
| 2414 | |
| 2415 intptr_t* locals; | |
| 2416 // If the caller is interpreted we need to make sure that locals points to the first | |
| 2417 // argument that the caller passed and not in an area where the stack might have been extended. | |
| 2418 // because the stack to stack to converter needs a proper locals value in order to remove the | |
| 2419 // arguments from the caller and place the result in the proper location. Hmm maybe it'd be | |
| 2420 // simpler if we simply stored the result in the BytecodeInterpreter object and let the c++ code | |
| 2421 // adjust the stack?? HMMM QQQ | |
| 2422 // | |
| 2423 if (caller->is_interpreted_frame()) { | |
| 2424 // locals must agree with the caller because it will be used to set the | |
| 2425 // caller's tos when we return. | |
| 2426 interpreterState prev = caller->get_interpreterState(); | |
| 2427 // stack() is prepushed. | |
| 2428 locals = prev->stack() + method->size_of_parameters(); | |
| 2429 // locals = caller->unextended_sp() + (method->size_of_parameters() - 1); | |
| 2430 if (locals != interpreter_frame->fp() + frame::sender_sp_offset + (method->max_locals() - 1) + 2) { | |
| 2431 // os::breakpoint(); | |
| 2432 } | |
| 2433 } else { | |
| 2434 // this is where a c2i would have placed locals (except for the +2) | |
| 2435 locals = interpreter_frame->fp() + frame::sender_sp_offset + (method->max_locals() - 1) + 2; | |
| 2436 } | |
| 2437 | |
| 2438 intptr_t* monitor_base = (intptr_t*) cur_state; | |
| 2439 intptr_t* stack_base = (intptr_t*) ((intptr_t) monitor_base - monitor_size); | |
| 2440 /* +1 because stack is always prepushed */ | |
| 2441 intptr_t* stack = (intptr_t*) ((intptr_t) stack_base - (tempcount + 1) * BytesPerWord); | |
| 2442 | |
| 2443 | |
| 2444 BytecodeInterpreter::layout_interpreterState(cur_state, | |
| 2445 caller, | |
| 2446 interpreter_frame, | |
| 2447 method, | |
| 2448 locals, | |
| 2449 stack, | |
| 2450 stack_base, | |
| 2451 monitor_base, | |
| 2452 frame_bottom, | |
| 2453 is_top_frame); | |
| 2454 | |
| 2455 // BytecodeInterpreter::pd_layout_interpreterState(cur_state, interpreter_return_address, interpreter_frame->fp()); | |
| 2456 } | |
| 2457 return frame_size/BytesPerWord; | |
| 2458 } | |
| 2459 | |
| 2460 #endif // CC_INTERP (all) |