Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/v8.h" |
| 6 | |
| 7 | #if V8_TARGET_ARCH_X87 |
| 8 | |
| 9 | #include "src/code-factory.h" |
| 10 | #include "src/codegen.h" |
| 11 | #include "src/deoptimizer.h" |
| 12 | #include "src/full-codegen.h" |
| 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | |
| 17 | |
| 18 | #define __ ACCESS_MASM(masm) |
| 19 | |
| 20 | |
| 21 | void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| 22 | CFunctionId id, |
| 23 | BuiltinExtraArguments extra_args) { |
| 24 | // ----------- S t a t e ------------- |
| 25 | // -- eax : number of arguments excluding receiver |
| 26 | // -- edi : called function (only guaranteed when |
| 27 | // extra_args requires it) |
| 28 | // -- esi : context |
| 29 | // -- esp[0] : return address |
| 30 | // -- esp[4] : last argument |
| 31 | // -- ... |
| 32 | // -- esp[4 * argc] : first argument (argc == eax) |
| 33 | // -- esp[4 * (argc +1)] : receiver |
| 34 | // ----------------------------------- |
| 35 | |
| 36 | // Insert extra arguments. |
| 37 | int num_extra_args = 0; |
| 38 | if (extra_args == NEEDS_CALLED_FUNCTION) { |
| 39 | num_extra_args = 1; |
| 40 | Register scratch = ebx; |
| 41 | __ pop(scratch); // Save return address. |
| 42 | __ push(edi); |
| 43 | __ push(scratch); // Restore return address. |
| 44 | } else { |
| 45 | DCHECK(extra_args == NO_EXTRA_ARGUMENTS); |
| 46 | } |
| 47 | |
| 48 | // JumpToExternalReference expects eax to contain the number of arguments |
| 49 | // including the receiver and the extra arguments. |
| 50 | __ add(eax, Immediate(num_extra_args + 1)); |
| 51 | __ JumpToExternalReference(ExternalReference(id, masm->isolate())); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | static void CallRuntimePassFunction( |
| 56 | MacroAssembler* masm, Runtime::FunctionId function_id) { |
| 57 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 58 | // Push a copy of the function. |
| 59 | __ push(edi); |
| 60 | // Function is also the parameter to the runtime call. |
| 61 | __ push(edi); |
| 62 | |
| 63 | __ CallRuntime(function_id, 1); |
| 64 | // Restore receiver. |
| 65 | __ pop(edi); |
| 66 | } |
| 67 | |
| 68 | |
| 69 | static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| 70 | __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 71 | __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kCodeOffset)); |
| 72 | __ lea(eax, FieldOperand(eax, Code::kHeaderSize)); |
| 73 | __ jmp(eax); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | static void GenerateTailCallToReturnedCode(MacroAssembler* masm) { |
| 78 | __ lea(eax, FieldOperand(eax, Code::kHeaderSize)); |
| 79 | __ jmp(eax); |
| 80 | } |
| 81 | |
| 82 | |
| 83 | void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) { |
| 84 | // Checking whether the queued function is ready for install is optional, |
| 85 | // since we come across interrupts and stack checks elsewhere. However, |
| 86 | // not checking may delay installing ready functions, and always checking |
| 87 | // would be quite expensive. A good compromise is to first check against |
| 88 | // stack limit as a cue for an interrupt signal. |
| 89 | Label ok; |
| 90 | ExternalReference stack_limit = |
| 91 | ExternalReference::address_of_stack_limit(masm->isolate()); |
| 92 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| 93 | __ j(above_equal, &ok, Label::kNear); |
| 94 | |
| 95 | CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode); |
| 96 | GenerateTailCallToReturnedCode(masm); |
| 97 | |
| 98 | __ bind(&ok); |
| 99 | GenerateTailCallToSharedCode(masm); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| 104 | bool is_api_function, |
| 105 | bool create_memento) { |
| 106 | // ----------- S t a t e ------------- |
| 107 | // -- eax: number of arguments |
| 108 | // -- edi: constructor function |
| 109 | // -- ebx: allocation site or undefined |
| 110 | // ----------------------------------- |
| 111 | |
| 112 | // Should never create mementos for api functions. |
| 113 | DCHECK(!is_api_function || !create_memento); |
| 114 | |
| 115 | // Enter a construct frame. |
| 116 | { |
| 117 | FrameScope scope(masm, StackFrame::CONSTRUCT); |
| 118 | |
| 119 | if (create_memento) { |
| 120 | __ AssertUndefinedOrAllocationSite(ebx); |
| 121 | __ push(ebx); |
| 122 | } |
| 123 | |
| 124 | // Store a smi-tagged arguments count on the stack. |
| 125 | __ SmiTag(eax); |
| 126 | __ push(eax); |
| 127 | |
| 128 | // Push the function to invoke on the stack. |
| 129 | __ push(edi); |
| 130 | |
| 131 | // Try to allocate the object without transitioning into C code. If any of |
| 132 | // the preconditions is not met, the code bails out to the runtime call. |
| 133 | Label rt_call, allocated; |
| 134 | if (FLAG_inline_new) { |
| 135 | Label undo_allocation; |
| 136 | ExternalReference debug_step_in_fp = |
| 137 | ExternalReference::debug_step_in_fp_address(masm->isolate()); |
| 138 | __ cmp(Operand::StaticVariable(debug_step_in_fp), Immediate(0)); |
| 139 | __ j(not_equal, &rt_call); |
| 140 | |
| 141 | // Verified that the constructor is a JSFunction. |
| 142 | // Load the initial map and verify that it is in fact a map. |
| 143 | // edi: constructor |
| 144 | __ mov(eax, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 145 | // Will both indicate a NULL and a Smi |
| 146 | __ JumpIfSmi(eax, &rt_call); |
| 147 | // edi: constructor |
| 148 | // eax: initial map (if proven valid below) |
| 149 | __ CmpObjectType(eax, MAP_TYPE, ebx); |
| 150 | __ j(not_equal, &rt_call); |
| 151 | |
| 152 | // Check that the constructor is not constructing a JSFunction (see |
| 153 | // comments in Runtime_NewObject in runtime.cc). In which case the |
| 154 | // initial map's instance type would be JS_FUNCTION_TYPE. |
| 155 | // edi: constructor |
| 156 | // eax: initial map |
| 157 | __ CmpInstanceType(eax, JS_FUNCTION_TYPE); |
| 158 | __ j(equal, &rt_call); |
| 159 | |
| 160 | if (!is_api_function) { |
| 161 | Label allocate; |
| 162 | // The code below relies on these assumptions. |
| 163 | STATIC_ASSERT(JSFunction::kNoSlackTracking == 0); |
| 164 | STATIC_ASSERT(Map::ConstructionCount::kShift + |
| 165 | Map::ConstructionCount::kSize == 32); |
| 166 | // Check if slack tracking is enabled. |
| 167 | __ mov(esi, FieldOperand(eax, Map::kBitField3Offset)); |
| 168 | __ shr(esi, Map::ConstructionCount::kShift); |
| 169 | __ j(zero, &allocate); // JSFunction::kNoSlackTracking |
| 170 | // Decrease generous allocation count. |
| 171 | __ sub(FieldOperand(eax, Map::kBitField3Offset), |
| 172 | Immediate(1 << Map::ConstructionCount::kShift)); |
| 173 | |
| 174 | __ cmp(esi, JSFunction::kFinishSlackTracking); |
| 175 | __ j(not_equal, &allocate); |
| 176 | |
| 177 | __ push(eax); |
| 178 | __ push(edi); |
| 179 | |
| 180 | __ push(edi); // constructor |
| 181 | __ CallRuntime(Runtime::kFinalizeInstanceSize, 1); |
| 182 | |
| 183 | __ pop(edi); |
| 184 | __ pop(eax); |
| 185 | __ xor_(esi, esi); // JSFunction::kNoSlackTracking |
| 186 | |
| 187 | __ bind(&allocate); |
| 188 | } |
| 189 | |
| 190 | // Now allocate the JSObject on the heap. |
| 191 | // edi: constructor |
| 192 | // eax: initial map |
| 193 | __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset)); |
| 194 | __ shl(edi, kPointerSizeLog2); |
| 195 | if (create_memento) { |
| 196 | __ add(edi, Immediate(AllocationMemento::kSize)); |
| 197 | } |
| 198 | |
| 199 | __ Allocate(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS); |
| 200 | |
| 201 | Factory* factory = masm->isolate()->factory(); |
| 202 | |
| 203 | // Allocated the JSObject, now initialize the fields. |
| 204 | // eax: initial map |
| 205 | // ebx: JSObject |
| 206 | // edi: start of next object (including memento if create_memento) |
| 207 | __ mov(Operand(ebx, JSObject::kMapOffset), eax); |
| 208 | __ mov(ecx, factory->empty_fixed_array()); |
| 209 | __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); |
| 210 | __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); |
| 211 | // Set extra fields in the newly allocated object. |
| 212 | // eax: initial map |
| 213 | // ebx: JSObject |
| 214 | // edi: start of next object (including memento if create_memento) |
| 215 | // esi: slack tracking counter (non-API function case) |
| 216 | __ mov(edx, factory->undefined_value()); |
| 217 | __ lea(ecx, Operand(ebx, JSObject::kHeaderSize)); |
| 218 | if (!is_api_function) { |
| 219 | Label no_inobject_slack_tracking; |
| 220 | |
| 221 | // Check if slack tracking is enabled. |
| 222 | __ cmp(esi, JSFunction::kNoSlackTracking); |
| 223 | __ j(equal, &no_inobject_slack_tracking); |
| 224 | |
| 225 | // Allocate object with a slack. |
| 226 | __ movzx_b(esi, |
| 227 | FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset)); |
| 228 | __ lea(esi, |
| 229 | Operand(ebx, esi, times_pointer_size, JSObject::kHeaderSize)); |
| 230 | // esi: offset of first field after pre-allocated fields |
| 231 | if (FLAG_debug_code) { |
| 232 | __ cmp(esi, edi); |
| 233 | __ Assert(less_equal, |
| 234 | kUnexpectedNumberOfPreAllocatedPropertyFields); |
| 235 | } |
| 236 | __ InitializeFieldsWithFiller(ecx, esi, edx); |
| 237 | __ mov(edx, factory->one_pointer_filler_map()); |
| 238 | // Fill the remaining fields with one pointer filler map. |
| 239 | |
| 240 | __ bind(&no_inobject_slack_tracking); |
| 241 | } |
| 242 | |
| 243 | if (create_memento) { |
| 244 | __ lea(esi, Operand(edi, -AllocationMemento::kSize)); |
| 245 | __ InitializeFieldsWithFiller(ecx, esi, edx); |
| 246 | |
| 247 | // Fill in memento fields if necessary. |
| 248 | // esi: points to the allocated but uninitialized memento. |
| 249 | __ mov(Operand(esi, AllocationMemento::kMapOffset), |
| 250 | factory->allocation_memento_map()); |
| 251 | // Get the cell or undefined. |
| 252 | __ mov(edx, Operand(esp, kPointerSize*2)); |
| 253 | __ mov(Operand(esi, AllocationMemento::kAllocationSiteOffset), |
| 254 | edx); |
| 255 | } else { |
| 256 | __ InitializeFieldsWithFiller(ecx, edi, edx); |
| 257 | } |
| 258 | |
| 259 | // Add the object tag to make the JSObject real, so that we can continue |
| 260 | // and jump into the continuation code at any time from now on. Any |
| 261 | // failures need to undo the allocation, so that the heap is in a |
| 262 | // consistent state and verifiable. |
| 263 | // eax: initial map |
| 264 | // ebx: JSObject |
| 265 | // edi: start of next object |
| 266 | __ or_(ebx, Immediate(kHeapObjectTag)); |
| 267 | |
| 268 | // Check if a non-empty properties array is needed. |
| 269 | // Allocate and initialize a FixedArray if it is. |
| 270 | // eax: initial map |
| 271 | // ebx: JSObject |
| 272 | // edi: start of next object |
| 273 | // Calculate the total number of properties described by the map. |
| 274 | __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset)); |
| 275 | __ movzx_b(ecx, |
| 276 | FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset)); |
| 277 | __ add(edx, ecx); |
| 278 | // Calculate unused properties past the end of the in-object properties. |
| 279 | __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset)); |
| 280 | __ sub(edx, ecx); |
| 281 | // Done if no extra properties are to be allocated. |
| 282 | __ j(zero, &allocated); |
| 283 | __ Assert(positive, kPropertyAllocationCountFailed); |
| 284 | |
| 285 | // Scale the number of elements by pointer size and add the header for |
| 286 | // FixedArrays to the start of the next object calculation from above. |
| 287 | // ebx: JSObject |
| 288 | // edi: start of next object (will be start of FixedArray) |
| 289 | // edx: number of elements in properties array |
| 290 | __ Allocate(FixedArray::kHeaderSize, |
| 291 | times_pointer_size, |
| 292 | edx, |
| 293 | REGISTER_VALUE_IS_INT32, |
| 294 | edi, |
| 295 | ecx, |
| 296 | no_reg, |
| 297 | &undo_allocation, |
| 298 | RESULT_CONTAINS_TOP); |
| 299 | |
| 300 | // Initialize the FixedArray. |
| 301 | // ebx: JSObject |
| 302 | // edi: FixedArray |
| 303 | // edx: number of elements |
| 304 | // ecx: start of next object |
| 305 | __ mov(eax, factory->fixed_array_map()); |
| 306 | __ mov(Operand(edi, FixedArray::kMapOffset), eax); // setup the map |
| 307 | __ SmiTag(edx); |
| 308 | __ mov(Operand(edi, FixedArray::kLengthOffset), edx); // and length |
| 309 | |
| 310 | // Initialize the fields to undefined. |
| 311 | // ebx: JSObject |
| 312 | // edi: FixedArray |
| 313 | // ecx: start of next object |
| 314 | { Label loop, entry; |
| 315 | __ mov(edx, factory->undefined_value()); |
| 316 | __ lea(eax, Operand(edi, FixedArray::kHeaderSize)); |
| 317 | __ jmp(&entry); |
| 318 | __ bind(&loop); |
| 319 | __ mov(Operand(eax, 0), edx); |
| 320 | __ add(eax, Immediate(kPointerSize)); |
| 321 | __ bind(&entry); |
| 322 | __ cmp(eax, ecx); |
| 323 | __ j(below, &loop); |
| 324 | } |
| 325 | |
| 326 | // Store the initialized FixedArray into the properties field of |
| 327 | // the JSObject |
| 328 | // ebx: JSObject |
| 329 | // edi: FixedArray |
| 330 | __ or_(edi, Immediate(kHeapObjectTag)); // add the heap tag |
| 331 | __ mov(FieldOperand(ebx, JSObject::kPropertiesOffset), edi); |
| 332 | |
| 333 | |
| 334 | // Continue with JSObject being successfully allocated |
| 335 | // ebx: JSObject |
| 336 | __ jmp(&allocated); |
| 337 | |
| 338 | // Undo the setting of the new top so that the heap is verifiable. For |
| 339 | // example, the map's unused properties potentially do not match the |
| 340 | // allocated objects unused properties. |
| 341 | // ebx: JSObject (previous new top) |
| 342 | __ bind(&undo_allocation); |
| 343 | __ UndoAllocationInNewSpace(ebx); |
| 344 | } |
| 345 | |
| 346 | // Allocate the new receiver object using the runtime call. |
| 347 | __ bind(&rt_call); |
| 348 | int offset = 0; |
| 349 | if (create_memento) { |
| 350 | // Get the cell or allocation site. |
| 351 | __ mov(edi, Operand(esp, kPointerSize * 2)); |
| 352 | __ push(edi); |
| 353 | offset = kPointerSize; |
| 354 | } |
| 355 | |
| 356 | // Must restore esi (context) and edi (constructor) before calling runtime. |
| 357 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 358 | __ mov(edi, Operand(esp, offset)); |
| 359 | // edi: function (constructor) |
| 360 | __ push(edi); |
| 361 | if (create_memento) { |
| 362 | __ CallRuntime(Runtime::kNewObjectWithAllocationSite, 2); |
| 363 | } else { |
| 364 | __ CallRuntime(Runtime::kNewObject, 1); |
| 365 | } |
| 366 | __ mov(ebx, eax); // store result in ebx |
| 367 | |
| 368 | // If we ended up using the runtime, and we want a memento, then the |
| 369 | // runtime call made it for us, and we shouldn't do create count |
| 370 | // increment. |
| 371 | Label count_incremented; |
| 372 | if (create_memento) { |
| 373 | __ jmp(&count_incremented); |
| 374 | } |
| 375 | |
| 376 | // New object allocated. |
| 377 | // ebx: newly allocated object |
| 378 | __ bind(&allocated); |
| 379 | |
| 380 | if (create_memento) { |
| 381 | __ mov(ecx, Operand(esp, kPointerSize * 2)); |
| 382 | __ cmp(ecx, masm->isolate()->factory()->undefined_value()); |
| 383 | __ j(equal, &count_incremented); |
| 384 | // ecx is an AllocationSite. We are creating a memento from it, so we |
| 385 | // need to increment the memento create count. |
| 386 | __ add(FieldOperand(ecx, AllocationSite::kPretenureCreateCountOffset), |
| 387 | Immediate(Smi::FromInt(1))); |
| 388 | __ bind(&count_incremented); |
| 389 | } |
| 390 | |
| 391 | // Retrieve the function from the stack. |
| 392 | __ pop(edi); |
| 393 | |
| 394 | // Retrieve smi-tagged arguments count from the stack. |
| 395 | __ mov(eax, Operand(esp, 0)); |
| 396 | __ SmiUntag(eax); |
| 397 | |
| 398 | // Push the allocated receiver to the stack. We need two copies |
| 399 | // because we may have to return the original one and the calling |
| 400 | // conventions dictate that the called function pops the receiver. |
| 401 | __ push(ebx); |
| 402 | __ push(ebx); |
| 403 | |
| 404 | // Set up pointer to last argument. |
| 405 | __ lea(ebx, Operand(ebp, StandardFrameConstants::kCallerSPOffset)); |
| 406 | |
| 407 | // Copy arguments and receiver to the expression stack. |
| 408 | Label loop, entry; |
| 409 | __ mov(ecx, eax); |
| 410 | __ jmp(&entry); |
| 411 | __ bind(&loop); |
| 412 | __ push(Operand(ebx, ecx, times_4, 0)); |
| 413 | __ bind(&entry); |
| 414 | __ dec(ecx); |
| 415 | __ j(greater_equal, &loop); |
| 416 | |
| 417 | // Call the function. |
| 418 | if (is_api_function) { |
| 419 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 420 | Handle<Code> code = |
| 421 | masm->isolate()->builtins()->HandleApiCallConstruct(); |
| 422 | __ call(code, RelocInfo::CODE_TARGET); |
| 423 | } else { |
| 424 | ParameterCount actual(eax); |
| 425 | __ InvokeFunction(edi, actual, CALL_FUNCTION, |
| 426 | NullCallWrapper()); |
| 427 | } |
| 428 | |
| 429 | // Store offset of return address for deoptimizer. |
| 430 | if (!is_api_function) { |
| 431 | masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| 432 | } |
| 433 | |
| 434 | // Restore context from the frame. |
| 435 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 436 | |
| 437 | // If the result is an object (in the ECMA sense), we should get rid |
| 438 | // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| 439 | // on page 74. |
| 440 | Label use_receiver, exit; |
| 441 | |
| 442 | // If the result is a smi, it is *not* an object in the ECMA sense. |
| 443 | __ JumpIfSmi(eax, &use_receiver); |
| 444 | |
| 445 | // If the type of the result (stored in its map) is less than |
| 446 | // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense. |
| 447 | __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx); |
| 448 | __ j(above_equal, &exit); |
| 449 | |
| 450 | // Throw away the result of the constructor invocation and use the |
| 451 | // on-stack receiver as the result. |
| 452 | __ bind(&use_receiver); |
| 453 | __ mov(eax, Operand(esp, 0)); |
| 454 | |
| 455 | // Restore the arguments count and leave the construct frame. |
| 456 | __ bind(&exit); |
| 457 | __ mov(ebx, Operand(esp, kPointerSize)); // Get arguments count. |
| 458 | |
| 459 | // Leave construct frame. |
| 460 | } |
| 461 | |
| 462 | // Remove caller arguments from the stack and return. |
| 463 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 464 | __ pop(ecx); |
| 465 | __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| 466 | __ push(ecx); |
| 467 | __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1); |
| 468 | __ ret(0); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| 473 | Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new); |
| 474 | } |
| 475 | |
| 476 | |
| 477 | void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| 478 | Generate_JSConstructStubHelper(masm, true, false); |
| 479 | } |
| 480 | |
| 481 | |
| 482 | static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| 483 | bool is_construct) { |
| 484 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 485 | |
| 486 | // Clear the context before we push it when entering the internal frame. |
| 487 | __ Move(esi, Immediate(0)); |
| 488 | |
| 489 | { |
| 490 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 491 | |
| 492 | // Load the previous frame pointer (ebx) to access C arguments |
| 493 | __ mov(ebx, Operand(ebp, 0)); |
| 494 | |
| 495 | // Get the function from the frame and setup the context. |
| 496 | __ mov(ecx, Operand(ebx, EntryFrameConstants::kFunctionArgOffset)); |
| 497 | __ mov(esi, FieldOperand(ecx, JSFunction::kContextOffset)); |
| 498 | |
| 499 | // Push the function and the receiver onto the stack. |
| 500 | __ push(ecx); |
| 501 | __ push(Operand(ebx, EntryFrameConstants::kReceiverArgOffset)); |
| 502 | |
| 503 | // Load the number of arguments and setup pointer to the arguments. |
| 504 | __ mov(eax, Operand(ebx, EntryFrameConstants::kArgcOffset)); |
| 505 | __ mov(ebx, Operand(ebx, EntryFrameConstants::kArgvOffset)); |
| 506 | |
| 507 | // Copy arguments to the stack in a loop. |
| 508 | Label loop, entry; |
| 509 | __ Move(ecx, Immediate(0)); |
| 510 | __ jmp(&entry); |
| 511 | __ bind(&loop); |
| 512 | __ mov(edx, Operand(ebx, ecx, times_4, 0)); // push parameter from argv |
| 513 | __ push(Operand(edx, 0)); // dereference handle |
| 514 | __ inc(ecx); |
| 515 | __ bind(&entry); |
| 516 | __ cmp(ecx, eax); |
| 517 | __ j(not_equal, &loop); |
| 518 | |
| 519 | // Get the function from the stack and call it. |
| 520 | // kPointerSize for the receiver. |
| 521 | __ mov(edi, Operand(esp, eax, times_4, kPointerSize)); |
| 522 | |
| 523 | // Invoke the code. |
| 524 | if (is_construct) { |
| 525 | // No type feedback cell is available |
| 526 | __ mov(ebx, masm->isolate()->factory()->undefined_value()); |
| 527 | CallConstructStub stub(masm->isolate(), NO_CALL_CONSTRUCTOR_FLAGS); |
| 528 | __ CallStub(&stub); |
| 529 | } else { |
| 530 | ParameterCount actual(eax); |
| 531 | __ InvokeFunction(edi, actual, CALL_FUNCTION, |
| 532 | NullCallWrapper()); |
| 533 | } |
| 534 | |
| 535 | // Exit the internal frame. Notice that this also removes the empty. |
| 536 | // context and the function left on the stack by the code |
| 537 | // invocation. |
| 538 | } |
| 539 | __ ret(kPointerSize); // Remove receiver. |
| 540 | } |
| 541 | |
| 542 | |
| 543 | void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 544 | Generate_JSEntryTrampolineHelper(masm, false); |
| 545 | } |
| 546 | |
| 547 | |
| 548 | void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 549 | Generate_JSEntryTrampolineHelper(masm, true); |
| 550 | } |
| 551 | |
| 552 | |
| 553 | void Builtins::Generate_CompileLazy(MacroAssembler* masm) { |
| 554 | CallRuntimePassFunction(masm, Runtime::kCompileLazy); |
| 555 | GenerateTailCallToReturnedCode(masm); |
| 556 | } |
| 557 | |
| 558 | |
| 559 | |
| 560 | static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) { |
| 561 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 562 | // Push a copy of the function. |
| 563 | __ push(edi); |
| 564 | // Function is also the parameter to the runtime call. |
| 565 | __ push(edi); |
| 566 | // Whether to compile in a background thread. |
| 567 | __ Push(masm->isolate()->factory()->ToBoolean(concurrent)); |
| 568 | |
| 569 | __ CallRuntime(Runtime::kCompileOptimized, 2); |
| 570 | // Restore receiver. |
| 571 | __ pop(edi); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | void Builtins::Generate_CompileOptimized(MacroAssembler* masm) { |
| 576 | CallCompileOptimized(masm, false); |
| 577 | GenerateTailCallToReturnedCode(masm); |
| 578 | } |
| 579 | |
| 580 | |
| 581 | void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) { |
| 582 | CallCompileOptimized(masm, true); |
| 583 | GenerateTailCallToReturnedCode(masm); |
| 584 | } |
| 585 | |
| 586 | |
| 587 | static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| 588 | // For now, we are relying on the fact that make_code_young doesn't do any |
| 589 | // garbage collection which allows us to save/restore the registers without |
| 590 | // worrying about which of them contain pointers. We also don't build an |
| 591 | // internal frame to make the code faster, since we shouldn't have to do stack |
| 592 | // crawls in MakeCodeYoung. This seems a bit fragile. |
| 593 | |
| 594 | // Re-execute the code that was patched back to the young age when |
| 595 | // the stub returns. |
| 596 | __ sub(Operand(esp, 0), Immediate(5)); |
| 597 | __ pushad(); |
| 598 | __ mov(eax, Operand(esp, 8 * kPointerSize)); |
| 599 | { |
| 600 | FrameScope scope(masm, StackFrame::MANUAL); |
| 601 | __ PrepareCallCFunction(2, ebx); |
| 602 | __ mov(Operand(esp, 1 * kPointerSize), |
| 603 | Immediate(ExternalReference::isolate_address(masm->isolate()))); |
| 604 | __ mov(Operand(esp, 0), eax); |
| 605 | __ CallCFunction( |
| 606 | ExternalReference::get_make_code_young_function(masm->isolate()), 2); |
| 607 | } |
| 608 | __ popad(); |
| 609 | __ ret(0); |
| 610 | } |
| 611 | |
| 612 | #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| 613 | void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \ |
| 614 | MacroAssembler* masm) { \ |
| 615 | GenerateMakeCodeYoungAgainCommon(masm); \ |
| 616 | } \ |
| 617 | void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \ |
| 618 | MacroAssembler* masm) { \ |
| 619 | GenerateMakeCodeYoungAgainCommon(masm); \ |
| 620 | } |
| 621 | CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| 622 | #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| 623 | |
| 624 | |
| 625 | void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| 626 | // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| 627 | // that make_code_young doesn't do any garbage collection which allows us to |
| 628 | // save/restore the registers without worrying about which of them contain |
| 629 | // pointers. |
| 630 | __ pushad(); |
| 631 | __ mov(eax, Operand(esp, 8 * kPointerSize)); |
| 632 | __ sub(eax, Immediate(Assembler::kCallInstructionLength)); |
| 633 | { // NOLINT |
| 634 | FrameScope scope(masm, StackFrame::MANUAL); |
| 635 | __ PrepareCallCFunction(2, ebx); |
| 636 | __ mov(Operand(esp, 1 * kPointerSize), |
| 637 | Immediate(ExternalReference::isolate_address(masm->isolate()))); |
| 638 | __ mov(Operand(esp, 0), eax); |
| 639 | __ CallCFunction( |
| 640 | ExternalReference::get_mark_code_as_executed_function(masm->isolate()), |
| 641 | 2); |
| 642 | } |
| 643 | __ popad(); |
| 644 | |
| 645 | // Perform prologue operations usually performed by the young code stub. |
| 646 | __ pop(eax); // Pop return address into scratch register. |
| 647 | __ push(ebp); // Caller's frame pointer. |
| 648 | __ mov(ebp, esp); |
| 649 | __ push(esi); // Callee's context. |
| 650 | __ push(edi); // Callee's JS Function. |
| 651 | __ push(eax); // Push return address after frame prologue. |
| 652 | |
| 653 | // Jump to point after the code-age stub. |
| 654 | __ ret(0); |
| 655 | } |
| 656 | |
| 657 | |
| 658 | void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { |
| 659 | GenerateMakeCodeYoungAgainCommon(masm); |
| 660 | } |
| 661 | |
| 662 | |
| 663 | static void Generate_NotifyStubFailureHelper(MacroAssembler* masm, |
| 664 | SaveFPRegsMode save_doubles) { |
| 665 | // Enter an internal frame. |
| 666 | { |
| 667 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 668 | |
| 669 | // Preserve registers across notification, this is important for compiled |
| 670 | // stubs that tail call the runtime on deopts passing their parameters in |
| 671 | // registers. |
| 672 | __ pushad(); |
| 673 | __ CallRuntime(Runtime::kNotifyStubFailure, 0, save_doubles); |
| 674 | __ popad(); |
| 675 | // Tear down internal frame. |
| 676 | } |
| 677 | |
| 678 | __ pop(MemOperand(esp, 0)); // Ignore state offset |
| 679 | __ ret(0); // Return to IC Miss stub, continuation still on stack. |
| 680 | } |
| 681 | |
| 682 | |
| 683 | void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { |
| 684 | Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs); |
| 685 | } |
| 686 | |
| 687 | |
| 688 | void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) { |
| 689 | Generate_NotifyStubFailureHelper(masm, kSaveFPRegs); |
| 690 | } |
| 691 | |
| 692 | |
| 693 | static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| 694 | Deoptimizer::BailoutType type) { |
| 695 | { |
| 696 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 697 | |
| 698 | // Pass deoptimization type to the runtime system. |
| 699 | __ push(Immediate(Smi::FromInt(static_cast<int>(type)))); |
| 700 | __ CallRuntime(Runtime::kNotifyDeoptimized, 1); |
| 701 | |
| 702 | // Tear down internal frame. |
| 703 | } |
| 704 | |
| 705 | // Get the full codegen state from the stack and untag it. |
| 706 | __ mov(ecx, Operand(esp, 1 * kPointerSize)); |
| 707 | __ SmiUntag(ecx); |
| 708 | |
| 709 | // Switch on the state. |
| 710 | Label not_no_registers, not_tos_eax; |
| 711 | __ cmp(ecx, FullCodeGenerator::NO_REGISTERS); |
| 712 | __ j(not_equal, ¬_no_registers, Label::kNear); |
| 713 | __ ret(1 * kPointerSize); // Remove state. |
| 714 | |
| 715 | __ bind(¬_no_registers); |
| 716 | __ mov(eax, Operand(esp, 2 * kPointerSize)); |
| 717 | __ cmp(ecx, FullCodeGenerator::TOS_REG); |
| 718 | __ j(not_equal, ¬_tos_eax, Label::kNear); |
| 719 | __ ret(2 * kPointerSize); // Remove state, eax. |
| 720 | |
| 721 | __ bind(¬_tos_eax); |
| 722 | __ Abort(kNoCasesLeft); |
| 723 | } |
| 724 | |
| 725 | |
| 726 | void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| 727 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| 728 | } |
| 729 | |
| 730 | |
| 731 | void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| 732 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| 733 | } |
| 734 | |
| 735 | |
| 736 | void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| 737 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| 738 | } |
| 739 | |
| 740 | |
| 741 | void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| 742 | Factory* factory = masm->isolate()->factory(); |
| 743 | |
| 744 | // 1. Make sure we have at least one argument. |
| 745 | { Label done; |
| 746 | __ test(eax, eax); |
| 747 | __ j(not_zero, &done); |
| 748 | __ pop(ebx); |
| 749 | __ push(Immediate(factory->undefined_value())); |
| 750 | __ push(ebx); |
| 751 | __ inc(eax); |
| 752 | __ bind(&done); |
| 753 | } |
| 754 | |
| 755 | // 2. Get the function to call (passed as receiver) from the stack, check |
| 756 | // if it is a function. |
| 757 | Label slow, non_function; |
| 758 | // 1 ~ return address. |
| 759 | __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); |
| 760 | __ JumpIfSmi(edi, &non_function); |
| 761 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| 762 | __ j(not_equal, &slow); |
| 763 | |
| 764 | |
| 765 | // 3a. Patch the first argument if necessary when calling a function. |
| 766 | Label shift_arguments; |
| 767 | __ Move(edx, Immediate(0)); // indicate regular JS_FUNCTION |
| 768 | { Label convert_to_object, use_global_proxy, patch_receiver; |
| 769 | // Change context eagerly in case we need the global receiver. |
| 770 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 771 | |
| 772 | // Do not transform the receiver for strict mode functions. |
| 773 | __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 774 | __ test_b(FieldOperand(ebx, SharedFunctionInfo::kStrictModeByteOffset), |
| 775 | 1 << SharedFunctionInfo::kStrictModeBitWithinByte); |
| 776 | __ j(not_equal, &shift_arguments); |
| 777 | |
| 778 | // Do not transform the receiver for natives (shared already in ebx). |
| 779 | __ test_b(FieldOperand(ebx, SharedFunctionInfo::kNativeByteOffset), |
| 780 | 1 << SharedFunctionInfo::kNativeBitWithinByte); |
| 781 | __ j(not_equal, &shift_arguments); |
| 782 | |
| 783 | // Compute the receiver in sloppy mode. |
| 784 | __ mov(ebx, Operand(esp, eax, times_4, 0)); // First argument. |
| 785 | |
| 786 | // Call ToObject on the receiver if it is not an object, or use the |
| 787 | // global object if it is null or undefined. |
| 788 | __ JumpIfSmi(ebx, &convert_to_object); |
| 789 | __ cmp(ebx, factory->null_value()); |
| 790 | __ j(equal, &use_global_proxy); |
| 791 | __ cmp(ebx, factory->undefined_value()); |
| 792 | __ j(equal, &use_global_proxy); |
| 793 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 794 | __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx); |
| 795 | __ j(above_equal, &shift_arguments); |
| 796 | |
| 797 | __ bind(&convert_to_object); |
| 798 | |
| 799 | { // In order to preserve argument count. |
| 800 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 801 | __ SmiTag(eax); |
| 802 | __ push(eax); |
| 803 | |
| 804 | __ push(ebx); |
| 805 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 806 | __ mov(ebx, eax); |
| 807 | __ Move(edx, Immediate(0)); // restore |
| 808 | |
| 809 | __ pop(eax); |
| 810 | __ SmiUntag(eax); |
| 811 | } |
| 812 | |
| 813 | // Restore the function to edi. |
| 814 | __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize)); |
| 815 | __ jmp(&patch_receiver); |
| 816 | |
| 817 | __ bind(&use_global_proxy); |
| 818 | __ mov(ebx, |
| 819 | Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 820 | __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalProxyOffset)); |
| 821 | |
| 822 | __ bind(&patch_receiver); |
| 823 | __ mov(Operand(esp, eax, times_4, 0), ebx); |
| 824 | |
| 825 | __ jmp(&shift_arguments); |
| 826 | } |
| 827 | |
| 828 | // 3b. Check for function proxy. |
| 829 | __ bind(&slow); |
| 830 | __ Move(edx, Immediate(1)); // indicate function proxy |
| 831 | __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); |
| 832 | __ j(equal, &shift_arguments); |
| 833 | __ bind(&non_function); |
| 834 | __ Move(edx, Immediate(2)); // indicate non-function |
| 835 | |
| 836 | // 3c. Patch the first argument when calling a non-function. The |
| 837 | // CALL_NON_FUNCTION builtin expects the non-function callee as |
| 838 | // receiver, so overwrite the first argument which will ultimately |
| 839 | // become the receiver. |
| 840 | __ mov(Operand(esp, eax, times_4, 0), edi); |
| 841 | |
| 842 | // 4. Shift arguments and return address one slot down on the stack |
| 843 | // (overwriting the original receiver). Adjust argument count to make |
| 844 | // the original first argument the new receiver. |
| 845 | __ bind(&shift_arguments); |
| 846 | { Label loop; |
| 847 | __ mov(ecx, eax); |
| 848 | __ bind(&loop); |
| 849 | __ mov(ebx, Operand(esp, ecx, times_4, 0)); |
| 850 | __ mov(Operand(esp, ecx, times_4, kPointerSize), ebx); |
| 851 | __ dec(ecx); |
| 852 | __ j(not_sign, &loop); // While non-negative (to copy return address). |
| 853 | __ pop(ebx); // Discard copy of return address. |
| 854 | __ dec(eax); // One fewer argument (first argument is new receiver). |
| 855 | } |
| 856 | |
| 857 | // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin, |
| 858 | // or a function proxy via CALL_FUNCTION_PROXY. |
| 859 | { Label function, non_proxy; |
| 860 | __ test(edx, edx); |
| 861 | __ j(zero, &function); |
| 862 | __ Move(ebx, Immediate(0)); |
| 863 | __ cmp(edx, Immediate(1)); |
| 864 | __ j(not_equal, &non_proxy); |
| 865 | |
| 866 | __ pop(edx); // return address |
| 867 | __ push(edi); // re-add proxy object as additional argument |
| 868 | __ push(edx); |
| 869 | __ inc(eax); |
| 870 | __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY); |
| 871 | __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 872 | RelocInfo::CODE_TARGET); |
| 873 | |
| 874 | __ bind(&non_proxy); |
| 875 | __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION); |
| 876 | __ jmp(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 877 | RelocInfo::CODE_TARGET); |
| 878 | __ bind(&function); |
| 879 | } |
| 880 | |
| 881 | // 5b. Get the code to call from the function and check that the number of |
| 882 | // expected arguments matches what we're providing. If so, jump |
| 883 | // (tail-call) to the code in register edx without checking arguments. |
| 884 | __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 885 | __ mov(ebx, |
| 886 | FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset)); |
| 887 | __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| 888 | __ SmiUntag(ebx); |
| 889 | __ cmp(eax, ebx); |
| 890 | __ j(not_equal, |
| 891 | masm->isolate()->builtins()->ArgumentsAdaptorTrampoline()); |
| 892 | |
| 893 | ParameterCount expected(0); |
| 894 | __ InvokeCode(edx, expected, expected, JUMP_FUNCTION, NullCallWrapper()); |
| 895 | } |
| 896 | |
| 897 | |
| 898 | void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| 899 | static const int kArgumentsOffset = 2 * kPointerSize; |
| 900 | static const int kReceiverOffset = 3 * kPointerSize; |
| 901 | static const int kFunctionOffset = 4 * kPointerSize; |
| 902 | { |
| 903 | FrameScope frame_scope(masm, StackFrame::INTERNAL); |
| 904 | |
| 905 | __ push(Operand(ebp, kFunctionOffset)); // push this |
| 906 | __ push(Operand(ebp, kArgumentsOffset)); // push arguments |
| 907 | __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
| 908 | |
| 909 | // Check the stack for overflow. We are not trying to catch |
| 910 | // interruptions (e.g. debug break and preemption) here, so the "real stack |
| 911 | // limit" is checked. |
| 912 | Label okay; |
| 913 | ExternalReference real_stack_limit = |
| 914 | ExternalReference::address_of_real_stack_limit(masm->isolate()); |
| 915 | __ mov(edi, Operand::StaticVariable(real_stack_limit)); |
| 916 | // Make ecx the space we have left. The stack might already be overflowed |
| 917 | // here which will cause ecx to become negative. |
| 918 | __ mov(ecx, esp); |
| 919 | __ sub(ecx, edi); |
| 920 | // Make edx the space we need for the array when it is unrolled onto the |
| 921 | // stack. |
| 922 | __ mov(edx, eax); |
| 923 | __ shl(edx, kPointerSizeLog2 - kSmiTagSize); |
| 924 | // Check if the arguments will overflow the stack. |
| 925 | __ cmp(ecx, edx); |
| 926 | __ j(greater, &okay); // Signed comparison. |
| 927 | |
| 928 | // Out of stack space. |
| 929 | __ push(Operand(ebp, 4 * kPointerSize)); // push this |
| 930 | __ push(eax); |
| 931 | __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION); |
| 932 | __ bind(&okay); |
| 933 | // End of stack check. |
| 934 | |
| 935 | // Push current index and limit. |
| 936 | const int kLimitOffset = |
| 937 | StandardFrameConstants::kExpressionsOffset - 1 * kPointerSize; |
| 938 | const int kIndexOffset = kLimitOffset - 1 * kPointerSize; |
| 939 | __ push(eax); // limit |
| 940 | __ push(Immediate(0)); // index |
| 941 | |
| 942 | // Get the receiver. |
| 943 | __ mov(ebx, Operand(ebp, kReceiverOffset)); |
| 944 | |
| 945 | // Check that the function is a JS function (otherwise it must be a proxy). |
| 946 | Label push_receiver, use_global_proxy; |
| 947 | __ mov(edi, Operand(ebp, kFunctionOffset)); |
| 948 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| 949 | __ j(not_equal, &push_receiver); |
| 950 | |
| 951 | // Change context eagerly to get the right global object if necessary. |
| 952 | __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset)); |
| 953 | |
| 954 | // Compute the receiver. |
| 955 | // Do not transform the receiver for strict mode functions. |
| 956 | Label call_to_object; |
| 957 | __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset)); |
| 958 | __ test_b(FieldOperand(ecx, SharedFunctionInfo::kStrictModeByteOffset), |
| 959 | 1 << SharedFunctionInfo::kStrictModeBitWithinByte); |
| 960 | __ j(not_equal, &push_receiver); |
| 961 | |
| 962 | Factory* factory = masm->isolate()->factory(); |
| 963 | |
| 964 | // Do not transform the receiver for natives (shared already in ecx). |
| 965 | __ test_b(FieldOperand(ecx, SharedFunctionInfo::kNativeByteOffset), |
| 966 | 1 << SharedFunctionInfo::kNativeBitWithinByte); |
| 967 | __ j(not_equal, &push_receiver); |
| 968 | |
| 969 | // Compute the receiver in sloppy mode. |
| 970 | // Call ToObject on the receiver if it is not an object, or use the |
| 971 | // global object if it is null or undefined. |
| 972 | __ JumpIfSmi(ebx, &call_to_object); |
| 973 | __ cmp(ebx, factory->null_value()); |
| 974 | __ j(equal, &use_global_proxy); |
| 975 | __ cmp(ebx, factory->undefined_value()); |
| 976 | __ j(equal, &use_global_proxy); |
| 977 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 978 | __ CmpObjectType(ebx, FIRST_SPEC_OBJECT_TYPE, ecx); |
| 979 | __ j(above_equal, &push_receiver); |
| 980 | |
| 981 | __ bind(&call_to_object); |
| 982 | __ push(ebx); |
| 983 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 984 | __ mov(ebx, eax); |
| 985 | __ jmp(&push_receiver); |
| 986 | |
| 987 | __ bind(&use_global_proxy); |
| 988 | __ mov(ebx, |
| 989 | Operand(esi, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 990 | __ mov(ebx, FieldOperand(ebx, GlobalObject::kGlobalProxyOffset)); |
| 991 | |
| 992 | // Push the receiver. |
| 993 | __ bind(&push_receiver); |
| 994 | __ push(ebx); |
| 995 | |
| 996 | // Copy all arguments from the array to the stack. |
| 997 | Label entry, loop; |
| 998 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 999 | Register key = LoadDescriptor::NameRegister(); |
| 1000 | __ mov(key, Operand(ebp, kIndexOffset)); |
| 1001 | __ jmp(&entry); |
| 1002 | __ bind(&loop); |
| 1003 | __ mov(receiver, Operand(ebp, kArgumentsOffset)); // load arguments |
| 1004 | |
| 1005 | // Use inline caching to speed up access to arguments. |
| 1006 | if (FLAG_vector_ics) { |
| 1007 | __ mov(VectorLoadICDescriptor::SlotRegister(), |
| 1008 | Immediate(Smi::FromInt(0))); |
| 1009 | } |
| 1010 | Handle<Code> ic = CodeFactory::KeyedLoadIC(masm->isolate()).code(); |
| 1011 | __ call(ic, RelocInfo::CODE_TARGET); |
| 1012 | // It is important that we do not have a test instruction after the |
| 1013 | // call. A test instruction after the call is used to indicate that |
| 1014 | // we have generated an inline version of the keyed load. In this |
| 1015 | // case, we know that we are not generating a test instruction next. |
| 1016 | |
| 1017 | // Push the nth argument. |
| 1018 | __ push(eax); |
| 1019 | |
| 1020 | // Update the index on the stack and in register key. |
| 1021 | __ mov(key, Operand(ebp, kIndexOffset)); |
| 1022 | __ add(key, Immediate(1 << kSmiTagSize)); |
| 1023 | __ mov(Operand(ebp, kIndexOffset), key); |
| 1024 | |
| 1025 | __ bind(&entry); |
| 1026 | __ cmp(key, Operand(ebp, kLimitOffset)); |
| 1027 | __ j(not_equal, &loop); |
| 1028 | |
| 1029 | // Call the function. |
| 1030 | Label call_proxy; |
| 1031 | ParameterCount actual(eax); |
| 1032 | __ Move(eax, key); |
| 1033 | __ SmiUntag(eax); |
| 1034 | __ mov(edi, Operand(ebp, kFunctionOffset)); |
| 1035 | __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx); |
| 1036 | __ j(not_equal, &call_proxy); |
| 1037 | __ InvokeFunction(edi, actual, CALL_FUNCTION, NullCallWrapper()); |
| 1038 | |
| 1039 | frame_scope.GenerateLeaveFrame(); |
| 1040 | __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| 1041 | |
| 1042 | // Call the function proxy. |
| 1043 | __ bind(&call_proxy); |
| 1044 | __ push(edi); // add function proxy as last argument |
| 1045 | __ inc(eax); |
| 1046 | __ Move(ebx, Immediate(0)); |
| 1047 | __ GetBuiltinEntry(edx, Builtins::CALL_FUNCTION_PROXY); |
| 1048 | __ call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1049 | RelocInfo::CODE_TARGET); |
| 1050 | |
| 1051 | // Leave internal frame. |
| 1052 | } |
| 1053 | __ ret(3 * kPointerSize); // remove this, receiver, and arguments |
| 1054 | } |
| 1055 | |
| 1056 | |
| 1057 | void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| 1058 | // ----------- S t a t e ------------- |
| 1059 | // -- eax : argc |
| 1060 | // -- esp[0] : return address |
| 1061 | // -- esp[4] : last argument |
| 1062 | // ----------------------------------- |
| 1063 | Label generic_array_code; |
| 1064 | |
| 1065 | // Get the InternalArray function. |
| 1066 | __ LoadGlobalFunction(Context::INTERNAL_ARRAY_FUNCTION_INDEX, edi); |
| 1067 | |
| 1068 | if (FLAG_debug_code) { |
| 1069 | // Initial map for the builtin InternalArray function should be a map. |
| 1070 | __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1071 | // Will both indicate a NULL and a Smi. |
| 1072 | __ test(ebx, Immediate(kSmiTagMask)); |
| 1073 | __ Assert(not_zero, kUnexpectedInitialMapForInternalArrayFunction); |
| 1074 | __ CmpObjectType(ebx, MAP_TYPE, ecx); |
| 1075 | __ Assert(equal, kUnexpectedInitialMapForInternalArrayFunction); |
| 1076 | } |
| 1077 | |
| 1078 | // Run the native code for the InternalArray function called as a normal |
| 1079 | // function. |
| 1080 | // tail call a stub |
| 1081 | InternalArrayConstructorStub stub(masm->isolate()); |
| 1082 | __ TailCallStub(&stub); |
| 1083 | } |
| 1084 | |
| 1085 | |
| 1086 | void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| 1087 | // ----------- S t a t e ------------- |
| 1088 | // -- eax : argc |
| 1089 | // -- esp[0] : return address |
| 1090 | // -- esp[4] : last argument |
| 1091 | // ----------------------------------- |
| 1092 | Label generic_array_code; |
| 1093 | |
| 1094 | // Get the Array function. |
| 1095 | __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, edi); |
| 1096 | |
| 1097 | if (FLAG_debug_code) { |
| 1098 | // Initial map for the builtin Array function should be a map. |
| 1099 | __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1100 | // Will both indicate a NULL and a Smi. |
| 1101 | __ test(ebx, Immediate(kSmiTagMask)); |
| 1102 | __ Assert(not_zero, kUnexpectedInitialMapForArrayFunction); |
| 1103 | __ CmpObjectType(ebx, MAP_TYPE, ecx); |
| 1104 | __ Assert(equal, kUnexpectedInitialMapForArrayFunction); |
| 1105 | } |
| 1106 | |
| 1107 | // Run the native code for the Array function called as a normal function. |
| 1108 | // tail call a stub |
| 1109 | __ mov(ebx, masm->isolate()->factory()->undefined_value()); |
| 1110 | ArrayConstructorStub stub(masm->isolate()); |
| 1111 | __ TailCallStub(&stub); |
| 1112 | } |
| 1113 | |
| 1114 | |
| 1115 | void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { |
| 1116 | // ----------- S t a t e ------------- |
| 1117 | // -- eax : number of arguments |
| 1118 | // -- edi : constructor function |
| 1119 | // -- esp[0] : return address |
| 1120 | // -- esp[(argc - n) * 4] : arg[n] (zero-based) |
| 1121 | // -- esp[(argc + 1) * 4] : receiver |
| 1122 | // ----------------------------------- |
| 1123 | Counters* counters = masm->isolate()->counters(); |
| 1124 | __ IncrementCounter(counters->string_ctor_calls(), 1); |
| 1125 | |
| 1126 | if (FLAG_debug_code) { |
| 1127 | __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, ecx); |
| 1128 | __ cmp(edi, ecx); |
| 1129 | __ Assert(equal, kUnexpectedStringFunction); |
| 1130 | } |
| 1131 | |
| 1132 | // Load the first argument into eax and get rid of the rest |
| 1133 | // (including the receiver). |
| 1134 | Label no_arguments; |
| 1135 | __ test(eax, eax); |
| 1136 | __ j(zero, &no_arguments); |
| 1137 | __ mov(ebx, Operand(esp, eax, times_pointer_size, 0)); |
| 1138 | __ pop(ecx); |
| 1139 | __ lea(esp, Operand(esp, eax, times_pointer_size, kPointerSize)); |
| 1140 | __ push(ecx); |
| 1141 | __ mov(eax, ebx); |
| 1142 | |
| 1143 | // Lookup the argument in the number to string cache. |
| 1144 | Label not_cached, argument_is_string; |
| 1145 | __ LookupNumberStringCache(eax, // Input. |
| 1146 | ebx, // Result. |
| 1147 | ecx, // Scratch 1. |
| 1148 | edx, // Scratch 2. |
| 1149 | ¬_cached); |
| 1150 | __ IncrementCounter(counters->string_ctor_cached_number(), 1); |
| 1151 | __ bind(&argument_is_string); |
| 1152 | // ----------- S t a t e ------------- |
| 1153 | // -- ebx : argument converted to string |
| 1154 | // -- edi : constructor function |
| 1155 | // -- esp[0] : return address |
| 1156 | // ----------------------------------- |
| 1157 | |
| 1158 | // Allocate a JSValue and put the tagged pointer into eax. |
| 1159 | Label gc_required; |
| 1160 | __ Allocate(JSValue::kSize, |
| 1161 | eax, // Result. |
| 1162 | ecx, // New allocation top (we ignore it). |
| 1163 | no_reg, |
| 1164 | &gc_required, |
| 1165 | TAG_OBJECT); |
| 1166 | |
| 1167 | // Set the map. |
| 1168 | __ LoadGlobalFunctionInitialMap(edi, ecx); |
| 1169 | if (FLAG_debug_code) { |
| 1170 | __ cmpb(FieldOperand(ecx, Map::kInstanceSizeOffset), |
| 1171 | JSValue::kSize >> kPointerSizeLog2); |
| 1172 | __ Assert(equal, kUnexpectedStringWrapperInstanceSize); |
| 1173 | __ cmpb(FieldOperand(ecx, Map::kUnusedPropertyFieldsOffset), 0); |
| 1174 | __ Assert(equal, kUnexpectedUnusedPropertiesOfStringWrapper); |
| 1175 | } |
| 1176 | __ mov(FieldOperand(eax, HeapObject::kMapOffset), ecx); |
| 1177 | |
| 1178 | // Set properties and elements. |
| 1179 | Factory* factory = masm->isolate()->factory(); |
| 1180 | __ Move(ecx, Immediate(factory->empty_fixed_array())); |
| 1181 | __ mov(FieldOperand(eax, JSObject::kPropertiesOffset), ecx); |
| 1182 | __ mov(FieldOperand(eax, JSObject::kElementsOffset), ecx); |
| 1183 | |
| 1184 | // Set the value. |
| 1185 | __ mov(FieldOperand(eax, JSValue::kValueOffset), ebx); |
| 1186 | |
| 1187 | // Ensure the object is fully initialized. |
| 1188 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| 1189 | |
| 1190 | // We're done. Return. |
| 1191 | __ ret(0); |
| 1192 | |
| 1193 | // The argument was not found in the number to string cache. Check |
| 1194 | // if it's a string already before calling the conversion builtin. |
| 1195 | Label convert_argument; |
| 1196 | __ bind(¬_cached); |
| 1197 | STATIC_ASSERT(kSmiTag == 0); |
| 1198 | __ JumpIfSmi(eax, &convert_argument); |
| 1199 | Condition is_string = masm->IsObjectStringType(eax, ebx, ecx); |
| 1200 | __ j(NegateCondition(is_string), &convert_argument); |
| 1201 | __ mov(ebx, eax); |
| 1202 | __ IncrementCounter(counters->string_ctor_string_value(), 1); |
| 1203 | __ jmp(&argument_is_string); |
| 1204 | |
| 1205 | // Invoke the conversion builtin and put the result into ebx. |
| 1206 | __ bind(&convert_argument); |
| 1207 | __ IncrementCounter(counters->string_ctor_conversions(), 1); |
| 1208 | { |
| 1209 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1210 | __ push(edi); // Preserve the function. |
| 1211 | __ push(eax); |
| 1212 | __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION); |
| 1213 | __ pop(edi); |
| 1214 | } |
| 1215 | __ mov(ebx, eax); |
| 1216 | __ jmp(&argument_is_string); |
| 1217 | |
| 1218 | // Load the empty string into ebx, remove the receiver from the |
| 1219 | // stack, and jump back to the case where the argument is a string. |
| 1220 | __ bind(&no_arguments); |
| 1221 | __ Move(ebx, Immediate(factory->empty_string())); |
| 1222 | __ pop(ecx); |
| 1223 | __ lea(esp, Operand(esp, kPointerSize)); |
| 1224 | __ push(ecx); |
| 1225 | __ jmp(&argument_is_string); |
| 1226 | |
| 1227 | // At this point the argument is already a string. Call runtime to |
| 1228 | // create a string wrapper. |
| 1229 | __ bind(&gc_required); |
| 1230 | __ IncrementCounter(counters->string_ctor_gc_required(), 1); |
| 1231 | { |
| 1232 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1233 | __ push(ebx); |
| 1234 | __ CallRuntime(Runtime::kNewStringWrapper, 1); |
| 1235 | } |
| 1236 | __ ret(0); |
| 1237 | } |
| 1238 | |
| 1239 | |
| 1240 | static void ArgumentsAdaptorStackCheck(MacroAssembler* masm, |
| 1241 | Label* stack_overflow) { |
| 1242 | // ----------- S t a t e ------------- |
| 1243 | // -- eax : actual number of arguments |
| 1244 | // -- ebx : expected number of arguments |
| 1245 | // -- edi : function (passed through to callee) |
| 1246 | // ----------------------------------- |
| 1247 | // Check the stack for overflow. We are not trying to catch |
| 1248 | // interruptions (e.g. debug break and preemption) here, so the "real stack |
| 1249 | // limit" is checked. |
| 1250 | ExternalReference real_stack_limit = |
| 1251 | ExternalReference::address_of_real_stack_limit(masm->isolate()); |
| 1252 | __ mov(edx, Operand::StaticVariable(real_stack_limit)); |
| 1253 | // Make ecx the space we have left. The stack might already be overflowed |
| 1254 | // here which will cause ecx to become negative. |
| 1255 | __ mov(ecx, esp); |
| 1256 | __ sub(ecx, edx); |
| 1257 | // Make edx the space we need for the array when it is unrolled onto the |
| 1258 | // stack. |
| 1259 | __ mov(edx, ebx); |
| 1260 | __ shl(edx, kPointerSizeLog2); |
| 1261 | // Check if the arguments will overflow the stack. |
| 1262 | __ cmp(ecx, edx); |
| 1263 | __ j(less_equal, stack_overflow); // Signed comparison. |
| 1264 | } |
| 1265 | |
| 1266 | |
| 1267 | static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1268 | __ push(ebp); |
| 1269 | __ mov(ebp, esp); |
| 1270 | |
| 1271 | // Store the arguments adaptor context sentinel. |
| 1272 | __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1273 | |
| 1274 | // Push the function on the stack. |
| 1275 | __ push(edi); |
| 1276 | |
| 1277 | // Preserve the number of arguments on the stack. Must preserve eax, |
| 1278 | // ebx and ecx because these registers are used when copying the |
| 1279 | // arguments and the receiver. |
| 1280 | STATIC_ASSERT(kSmiTagSize == 1); |
| 1281 | __ lea(edi, Operand(eax, eax, times_1, kSmiTag)); |
| 1282 | __ push(edi); |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1287 | // Retrieve the number of arguments from the stack. |
| 1288 | __ mov(ebx, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1289 | |
| 1290 | // Leave the frame. |
| 1291 | __ leave(); |
| 1292 | |
| 1293 | // Remove caller arguments from the stack. |
| 1294 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 1295 | __ pop(ecx); |
| 1296 | __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize)); // 1 ~ receiver |
| 1297 | __ push(ecx); |
| 1298 | } |
| 1299 | |
| 1300 | |
| 1301 | void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| 1302 | // ----------- S t a t e ------------- |
| 1303 | // -- eax : actual number of arguments |
| 1304 | // -- ebx : expected number of arguments |
| 1305 | // -- edi : function (passed through to callee) |
| 1306 | // ----------------------------------- |
| 1307 | |
| 1308 | Label invoke, dont_adapt_arguments; |
| 1309 | __ IncrementCounter(masm->isolate()->counters()->arguments_adaptors(), 1); |
| 1310 | |
| 1311 | Label stack_overflow; |
| 1312 | ArgumentsAdaptorStackCheck(masm, &stack_overflow); |
| 1313 | |
| 1314 | Label enough, too_few; |
| 1315 | __ mov(edx, FieldOperand(edi, JSFunction::kCodeEntryOffset)); |
| 1316 | __ cmp(eax, ebx); |
| 1317 | __ j(less, &too_few); |
| 1318 | __ cmp(ebx, SharedFunctionInfo::kDontAdaptArgumentsSentinel); |
| 1319 | __ j(equal, &dont_adapt_arguments); |
| 1320 | |
| 1321 | { // Enough parameters: Actual >= expected. |
| 1322 | __ bind(&enough); |
| 1323 | EnterArgumentsAdaptorFrame(masm); |
| 1324 | |
| 1325 | // Copy receiver and all expected arguments. |
| 1326 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 1327 | __ lea(eax, Operand(ebp, eax, times_4, offset)); |
| 1328 | __ mov(edi, -1); // account for receiver |
| 1329 | |
| 1330 | Label copy; |
| 1331 | __ bind(©); |
| 1332 | __ inc(edi); |
| 1333 | __ push(Operand(eax, 0)); |
| 1334 | __ sub(eax, Immediate(kPointerSize)); |
| 1335 | __ cmp(edi, ebx); |
| 1336 | __ j(less, ©); |
| 1337 | __ jmp(&invoke); |
| 1338 | } |
| 1339 | |
| 1340 | { // Too few parameters: Actual < expected. |
| 1341 | __ bind(&too_few); |
| 1342 | EnterArgumentsAdaptorFrame(masm); |
| 1343 | |
| 1344 | // Copy receiver and all actual arguments. |
| 1345 | const int offset = StandardFrameConstants::kCallerSPOffset; |
| 1346 | __ lea(edi, Operand(ebp, eax, times_4, offset)); |
| 1347 | // ebx = expected - actual. |
| 1348 | __ sub(ebx, eax); |
| 1349 | // eax = -actual - 1 |
| 1350 | __ neg(eax); |
| 1351 | __ sub(eax, Immediate(1)); |
| 1352 | |
| 1353 | Label copy; |
| 1354 | __ bind(©); |
| 1355 | __ inc(eax); |
| 1356 | __ push(Operand(edi, 0)); |
| 1357 | __ sub(edi, Immediate(kPointerSize)); |
| 1358 | __ test(eax, eax); |
| 1359 | __ j(not_zero, ©); |
| 1360 | |
| 1361 | // Fill remaining expected arguments with undefined values. |
| 1362 | Label fill; |
| 1363 | __ bind(&fill); |
| 1364 | __ inc(eax); |
| 1365 | __ push(Immediate(masm->isolate()->factory()->undefined_value())); |
| 1366 | __ cmp(eax, ebx); |
| 1367 | __ j(less, &fill); |
| 1368 | } |
| 1369 | |
| 1370 | // Call the entry point. |
| 1371 | __ bind(&invoke); |
| 1372 | // Restore function pointer. |
| 1373 | __ mov(edi, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1374 | __ call(edx); |
| 1375 | |
| 1376 | // Store offset of return address for deoptimizer. |
| 1377 | masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| 1378 | |
| 1379 | // Leave frame and return. |
| 1380 | LeaveArgumentsAdaptorFrame(masm); |
| 1381 | __ ret(0); |
| 1382 | |
| 1383 | // ------------------------------------------- |
| 1384 | // Dont adapt arguments. |
| 1385 | // ------------------------------------------- |
| 1386 | __ bind(&dont_adapt_arguments); |
| 1387 | __ jmp(edx); |
| 1388 | |
| 1389 | __ bind(&stack_overflow); |
| 1390 | { |
| 1391 | FrameScope frame(masm, StackFrame::MANUAL); |
| 1392 | EnterArgumentsAdaptorFrame(masm); |
| 1393 | __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION); |
| 1394 | __ int3(); |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | |
| 1399 | void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| 1400 | // Lookup the function in the JavaScript frame. |
| 1401 | __ mov(eax, Operand(ebp, JavaScriptFrameConstants::kFunctionOffset)); |
| 1402 | { |
| 1403 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1404 | // Pass function as argument. |
| 1405 | __ push(eax); |
| 1406 | __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1); |
| 1407 | } |
| 1408 | |
| 1409 | Label skip; |
| 1410 | // If the code object is null, just return to the unoptimized code. |
| 1411 | __ cmp(eax, Immediate(0)); |
| 1412 | __ j(not_equal, &skip, Label::kNear); |
| 1413 | __ ret(0); |
| 1414 | |
| 1415 | __ bind(&skip); |
| 1416 | |
| 1417 | // Load deoptimization data from the code object. |
| 1418 | __ mov(ebx, Operand(eax, Code::kDeoptimizationDataOffset - kHeapObjectTag)); |
| 1419 | |
| 1420 | // Load the OSR entrypoint offset from the deoptimization data. |
| 1421 | __ mov(ebx, Operand(ebx, FixedArray::OffsetOfElementAt( |
| 1422 | DeoptimizationInputData::kOsrPcOffsetIndex) - kHeapObjectTag)); |
| 1423 | __ SmiUntag(ebx); |
| 1424 | |
| 1425 | // Compute the target address = code_obj + header_size + osr_offset |
| 1426 | __ lea(eax, Operand(eax, ebx, times_1, Code::kHeaderSize - kHeapObjectTag)); |
| 1427 | |
| 1428 | // Overwrite the return address on the stack. |
| 1429 | __ mov(Operand(esp, 0), eax); |
| 1430 | |
| 1431 | // And "return" to the OSR entry point of the function. |
| 1432 | __ ret(0); |
| 1433 | } |
| 1434 | |
| 1435 | |
| 1436 | void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) { |
| 1437 | // We check the stack limit as indicator that recompilation might be done. |
| 1438 | Label ok; |
| 1439 | ExternalReference stack_limit = |
| 1440 | ExternalReference::address_of_stack_limit(masm->isolate()); |
| 1441 | __ cmp(esp, Operand::StaticVariable(stack_limit)); |
| 1442 | __ j(above_equal, &ok, Label::kNear); |
| 1443 | { |
| 1444 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1445 | __ CallRuntime(Runtime::kStackGuard, 0); |
| 1446 | } |
| 1447 | __ jmp(masm->isolate()->builtins()->OnStackReplacement(), |
| 1448 | RelocInfo::CODE_TARGET); |
| 1449 | |
| 1450 | __ bind(&ok); |
| 1451 | __ ret(0); |
| 1452 | } |
| 1453 | |
| 1454 | #undef __ |
| 1455 | } |
| 1456 | } // namespace v8::internal |
| 1457 | |
| 1458 | #endif // V8_TARGET_ARCH_X87 |