1 // Copyright 2017 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/builtins/builtins-call-gen.h"
6
7 #include "src/builtins/builtins-utils-gen.h"
8 #include "src/builtins/builtins.h"
9 #include "src/globals.h"
10 #include "src/heap/heap-inl.h"
11 #include "src/isolate.h"
12 #include "src/macro-assembler.h"
13 #include "src/objects/arguments.h"
14
15 namespace v8 {
16 namespace internal {
17
Generate_CallFunction_ReceiverIsNullOrUndefined(MacroAssembler * masm)18 void Builtins::Generate_CallFunction_ReceiverIsNullOrUndefined(
19 MacroAssembler* masm) {
20 Generate_CallFunction(masm, ConvertReceiverMode::kNullOrUndefined);
21 }
22
Generate_CallFunction_ReceiverIsNotNullOrUndefined(MacroAssembler * masm)23 void Builtins::Generate_CallFunction_ReceiverIsNotNullOrUndefined(
24 MacroAssembler* masm) {
25 Generate_CallFunction(masm, ConvertReceiverMode::kNotNullOrUndefined);
26 }
27
Generate_CallFunction_ReceiverIsAny(MacroAssembler * masm)28 void Builtins::Generate_CallFunction_ReceiverIsAny(MacroAssembler* masm) {
29 Generate_CallFunction(masm, ConvertReceiverMode::kAny);
30 }
31
Generate_CallBoundFunction(MacroAssembler * masm)32 void Builtins::Generate_CallBoundFunction(MacroAssembler* masm) {
33 Generate_CallBoundFunctionImpl(masm);
34 }
35
Generate_Call_ReceiverIsNullOrUndefined(MacroAssembler * masm)36 void Builtins::Generate_Call_ReceiverIsNullOrUndefined(MacroAssembler* masm) {
37 Generate_Call(masm, ConvertReceiverMode::kNullOrUndefined);
38 }
39
Generate_Call_ReceiverIsNotNullOrUndefined(MacroAssembler * masm)40 void Builtins::Generate_Call_ReceiverIsNotNullOrUndefined(
41 MacroAssembler* masm) {
42 Generate_Call(masm, ConvertReceiverMode::kNotNullOrUndefined);
43 }
44
Generate_Call_ReceiverIsAny(MacroAssembler * masm)45 void Builtins::Generate_Call_ReceiverIsAny(MacroAssembler* masm) {
46 Generate_Call(masm, ConvertReceiverMode::kAny);
47 }
48
Generate_CallVarargs(MacroAssembler * masm)49 void Builtins::Generate_CallVarargs(MacroAssembler* masm) {
50 Generate_CallOrConstructVarargs(masm, masm->isolate()->builtins()->Call());
51 }
52
Generate_CallForwardVarargs(MacroAssembler * masm)53 void Builtins::Generate_CallForwardVarargs(MacroAssembler* masm) {
54 Generate_CallOrConstructForwardVarargs(masm, CallOrConstructMode::kCall,
55 masm->isolate()->builtins()->Call());
56 }
57
Generate_CallFunctionForwardVarargs(MacroAssembler * masm)58 void Builtins::Generate_CallFunctionForwardVarargs(MacroAssembler* masm) {
59 Generate_CallOrConstructForwardVarargs(
60 masm, CallOrConstructMode::kCall,
61 masm->isolate()->builtins()->CallFunction());
62 }
63
CallOrConstructWithArrayLike(TNode<Object> target,SloppyTNode<Object> new_target,TNode<Object> arguments_list,TNode<Context> context)64 void CallOrConstructBuiltinsAssembler::CallOrConstructWithArrayLike(
65 TNode<Object> target, SloppyTNode<Object> new_target,
66 TNode<Object> arguments_list, TNode<Context> context) {
67 Label if_done(this), if_arguments(this), if_array(this),
68 if_holey_array(this, Label::kDeferred),
69 if_runtime(this, Label::kDeferred);
70
71 // Perform appropriate checks on {target} (and {new_target} first).
72 if (new_target == nullptr) {
73 // Check that {target} is Callable.
74 Label if_target_callable(this),
75 if_target_not_callable(this, Label::kDeferred);
76 GotoIf(TaggedIsSmi(target), &if_target_not_callable);
77 Branch(IsCallable(CAST(target)), &if_target_callable,
78 &if_target_not_callable);
79 BIND(&if_target_not_callable);
80 {
81 CallRuntime(Runtime::kThrowApplyNonFunction, context, target);
82 Unreachable();
83 }
84 BIND(&if_target_callable);
85 } else {
86 // Check that {target} is a Constructor.
87 Label if_target_constructor(this),
88 if_target_not_constructor(this, Label::kDeferred);
89 GotoIf(TaggedIsSmi(target), &if_target_not_constructor);
90 Branch(IsConstructor(CAST(target)), &if_target_constructor,
91 &if_target_not_constructor);
92 BIND(&if_target_not_constructor);
93 {
94 CallRuntime(Runtime::kThrowNotConstructor, context, target);
95 Unreachable();
96 }
97 BIND(&if_target_constructor);
98
99 // Check that {new_target} is a Constructor.
100 Label if_new_target_constructor(this),
101 if_new_target_not_constructor(this, Label::kDeferred);
102 GotoIf(TaggedIsSmi(new_target), &if_new_target_not_constructor);
103 Branch(IsConstructor(CAST(new_target)), &if_new_target_constructor,
104 &if_new_target_not_constructor);
105 BIND(&if_new_target_not_constructor);
106 {
107 CallRuntime(Runtime::kThrowNotConstructor, context, new_target);
108 Unreachable();
109 }
110 BIND(&if_new_target_constructor);
111 }
112
113 GotoIf(TaggedIsSmi(arguments_list), &if_runtime);
114
115 TNode<Map> arguments_list_map = LoadMap(CAST(arguments_list));
116 TNode<Context> native_context = LoadNativeContext(context);
117
118 // Check if {arguments_list} is an (unmodified) arguments object.
119 TNode<Map> sloppy_arguments_map = CAST(
120 LoadContextElement(native_context, Context::SLOPPY_ARGUMENTS_MAP_INDEX));
121 GotoIf(WordEqual(arguments_list_map, sloppy_arguments_map), &if_arguments);
122 TNode<Map> strict_arguments_map = CAST(
123 LoadContextElement(native_context, Context::STRICT_ARGUMENTS_MAP_INDEX));
124 GotoIf(WordEqual(arguments_list_map, strict_arguments_map), &if_arguments);
125
126 // Check if {arguments_list} is a fast JSArray.
127 Branch(IsJSArrayMap(arguments_list_map), &if_array, &if_runtime);
128
129 TVARIABLE(FixedArrayBase, var_elements);
130 TVARIABLE(Int32T, var_length);
131 BIND(&if_array);
132 {
133 // Try to extract the elements from a JSArray object.
134 var_elements = LoadElements(CAST(arguments_list));
135 var_length =
136 LoadAndUntagToWord32ObjectField(arguments_list, JSArray::kLengthOffset);
137
138 // Holey arrays and double backing stores need special treatment.
139 STATIC_ASSERT(PACKED_SMI_ELEMENTS == 0);
140 STATIC_ASSERT(HOLEY_SMI_ELEMENTS == 1);
141 STATIC_ASSERT(PACKED_ELEMENTS == 2);
142 STATIC_ASSERT(HOLEY_ELEMENTS == 3);
143 STATIC_ASSERT(PACKED_DOUBLE_ELEMENTS == 4);
144 STATIC_ASSERT(HOLEY_DOUBLE_ELEMENTS == 5);
145 STATIC_ASSERT(LAST_FAST_ELEMENTS_KIND == HOLEY_DOUBLE_ELEMENTS);
146
147 TNode<Int32T> kind = LoadMapElementsKind(arguments_list_map);
148
149 GotoIf(Int32GreaterThan(kind, Int32Constant(LAST_FAST_ELEMENTS_KIND)),
150 &if_runtime);
151 Branch(Word32And(kind, Int32Constant(1)), &if_holey_array, &if_done);
152 }
153
154 BIND(&if_holey_array);
155 {
156 // For holey JSArrays we need to check that the array prototype chain
157 // protector is intact and our prototype is the Array.prototype actually.
158 GotoIfNot(IsPrototypeInitialArrayPrototype(context, arguments_list_map),
159 &if_runtime);
160 Branch(IsNoElementsProtectorCellInvalid(), &if_runtime, &if_done);
161 }
162
163 BIND(&if_arguments);
164 {
165 TNode<JSArgumentsObject> js_arguments = CAST(arguments_list);
166 // Try to extract the elements from an JSArgumentsObject.
167 TNode<Object> length =
168 LoadObjectField(js_arguments, JSArgumentsObject::kLengthOffset);
169 TNode<FixedArrayBase> elements = LoadElements(js_arguments);
170 TNode<Smi> elements_length = LoadFixedArrayBaseLength(elements);
171 GotoIfNot(WordEqual(length, elements_length), &if_runtime);
172 var_elements = elements;
173 var_length = SmiToInt32(CAST(length));
174 Goto(&if_done);
175 }
176
177 BIND(&if_runtime);
178 {
179 // Ask the runtime to create the list (actually a FixedArray).
180 var_elements = CAST(CallRuntime(Runtime::kCreateListFromArrayLike, context,
181 arguments_list));
182 var_length = LoadAndUntagToWord32ObjectField(var_elements.value(),
183 FixedArray::kLengthOffset);
184 Goto(&if_done);
185 }
186
187 // Tail call to the appropriate builtin (depending on whether we have
188 // a {new_target} passed).
189 BIND(&if_done);
190 {
191 Label if_not_double(this), if_double(this);
192 TNode<Int32T> args_count = Int32Constant(0); // args already on the stack
193
194 TNode<Int32T> length = var_length.value();
195 {
196 Label normalize_done(this);
197 GotoIfNot(Word32Equal(length, Int32Constant(0)), &normalize_done);
198 // Make sure we don't accidentally pass along the
199 // empty_fixed_double_array since the tailed-called stubs cannot handle
200 // the normalization yet.
201 var_elements = EmptyFixedArrayConstant();
202 Goto(&normalize_done);
203
204 BIND(&normalize_done);
205 }
206
207 TNode<FixedArrayBase> elements = var_elements.value();
208 Branch(IsFixedDoubleArray(elements), &if_double, &if_not_double);
209
210 BIND(&if_not_double);
211 {
212 if (new_target == nullptr) {
213 Callable callable = CodeFactory::CallVarargs(isolate());
214 TailCallStub(callable, context, target, args_count, elements, length);
215 } else {
216 Callable callable = CodeFactory::ConstructVarargs(isolate());
217 TailCallStub(callable, context, target, new_target, args_count,
218 elements, length);
219 }
220 }
221
222 BIND(&if_double);
223 {
224 // Kind is hardcoded here because CreateListFromArrayLike will only
225 // produce holey double arrays.
226 CallOrConstructDoubleVarargs(target, new_target, CAST(elements), length,
227 args_count, context,
228 Int32Constant(HOLEY_DOUBLE_ELEMENTS));
229 }
230 }
231 }
232
233 // Takes a FixedArray of doubles and creates a new FixedArray with those doubles
234 // boxed as HeapNumbers, then tail calls CallVarargs/ConstructVarargs depending
235 // on whether {new_target} was passed.
CallOrConstructDoubleVarargs(TNode<Object> target,SloppyTNode<Object> new_target,TNode<FixedDoubleArray> elements,TNode<Int32T> length,TNode<Int32T> args_count,TNode<Context> context,TNode<Int32T> kind)236 void CallOrConstructBuiltinsAssembler::CallOrConstructDoubleVarargs(
237 TNode<Object> target, SloppyTNode<Object> new_target,
238 TNode<FixedDoubleArray> elements, TNode<Int32T> length,
239 TNode<Int32T> args_count, TNode<Context> context, TNode<Int32T> kind) {
240 Label if_done(this);
241
242 const ElementsKind new_kind = PACKED_ELEMENTS;
243 const WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER;
244 TNode<IntPtrT> intptr_length = ChangeInt32ToIntPtr(length);
245 CSA_ASSERT(this, WordNotEqual(intptr_length, IntPtrConstant(0)));
246
247 // Allocate a new FixedArray of Objects.
248 TNode<FixedArray> new_elements = CAST(AllocateFixedArray(
249 new_kind, intptr_length, CodeStubAssembler::kAllowLargeObjectAllocation));
250 Branch(Word32Equal(kind, Int32Constant(HOLEY_DOUBLE_ELEMENTS)),
251 [&] {
252 // Fill the FixedArray with pointers to HeapObjects.
253 CopyFixedArrayElements(HOLEY_DOUBLE_ELEMENTS, elements, new_kind,
254 new_elements, intptr_length, intptr_length,
255 barrier_mode);
256 Goto(&if_done);
257 },
258 [&] {
259 CopyFixedArrayElements(PACKED_DOUBLE_ELEMENTS, elements, new_kind,
260 new_elements, intptr_length, intptr_length,
261 barrier_mode);
262 Goto(&if_done);
263 });
264
265 BIND(&if_done);
266 {
267 if (new_target == nullptr) {
268 Callable callable = CodeFactory::CallVarargs(isolate());
269 TailCallStub(callable, context, target, args_count, new_elements, length);
270 } else {
271 Callable callable = CodeFactory::ConstructVarargs(isolate());
272 TailCallStub(callable, context, target, new_target, args_count,
273 new_elements, length);
274 }
275 }
276 }
277
CallOrConstructWithSpread(TNode<Object> target,TNode<Object> new_target,TNode<Object> spread,TNode<Int32T> args_count,TNode<Context> context)278 void CallOrConstructBuiltinsAssembler::CallOrConstructWithSpread(
279 TNode<Object> target, TNode<Object> new_target, TNode<Object> spread,
280 TNode<Int32T> args_count, TNode<Context> context) {
281 Label if_smiorobject(this), if_double(this),
282 if_generic(this, Label::kDeferred);
283
284 TVARIABLE(Int32T, var_length);
285 TVARIABLE(FixedArrayBase, var_elements);
286 TVARIABLE(Int32T, var_elements_kind);
287
288 GotoIf(TaggedIsSmi(spread), &if_generic);
289 TNode<Map> spread_map = LoadMap(CAST(spread));
290 GotoIfNot(IsJSArrayMap(spread_map), &if_generic);
291 TNode<JSArray> spread_array = CAST(spread);
292
293 // Check that we have the original Array.prototype.
294 GotoIfNot(IsPrototypeInitialArrayPrototype(context, spread_map), &if_generic);
295
296 // Check that there are no elements on the Array.prototype chain.
297 GotoIf(IsNoElementsProtectorCellInvalid(), &if_generic);
298
299 // Check that the Array.prototype hasn't been modified in a way that would
300 // affect iteration.
301 TNode<PropertyCell> protector_cell =
302 CAST(LoadRoot(Heap::kArrayIteratorProtectorRootIndex));
303 GotoIf(WordEqual(LoadObjectField(protector_cell, PropertyCell::kValueOffset),
304 SmiConstant(Isolate::kProtectorInvalid)),
305 &if_generic);
306 {
307 // The fast-path accesses the {spread} elements directly.
308 TNode<Int32T> spread_kind = LoadMapElementsKind(spread_map);
309 var_elements_kind = spread_kind;
310 var_length =
311 LoadAndUntagToWord32ObjectField(spread_array, JSArray::kLengthOffset);
312 var_elements = LoadElements(spread_array);
313
314 // Check elements kind of {spread}.
315 GotoIf(Int32LessThan(spread_kind, Int32Constant(PACKED_DOUBLE_ELEMENTS)),
316 &if_smiorobject);
317 Branch(
318 Int32GreaterThan(spread_kind, Int32Constant(LAST_FAST_ELEMENTS_KIND)),
319 &if_generic, &if_double);
320 }
321
322 BIND(&if_generic);
323 {
324 Label if_iterator_fn_not_callable(this, Label::kDeferred);
325 TNode<Object> iterator_fn =
326 GetProperty(context, spread, IteratorSymbolConstant());
327 GotoIfNot(TaggedIsCallable(iterator_fn), &if_iterator_fn_not_callable);
328 TNode<JSArray> list = CAST(
329 CallBuiltin(Builtins::kIterableToList, context, spread, iterator_fn));
330 var_length = LoadAndUntagToWord32ObjectField(list, JSArray::kLengthOffset);
331
332 var_elements = LoadElements(list);
333 var_elements_kind = LoadElementsKind(list);
334 Branch(Int32LessThan(var_elements_kind.value(),
335 Int32Constant(PACKED_DOUBLE_ELEMENTS)),
336 &if_smiorobject, &if_double);
337
338 BIND(&if_iterator_fn_not_callable);
339 ThrowTypeError(context, MessageTemplate::kIteratorSymbolNonCallable);
340 }
341
342 BIND(&if_smiorobject);
343 {
344 TNode<FixedArrayBase> elements = var_elements.value();
345 TNode<Int32T> length = var_length.value();
346
347 if (new_target == nullptr) {
348 Callable callable = CodeFactory::CallVarargs(isolate());
349 TailCallStub(callable, context, target, args_count, elements, length);
350 } else {
351 Callable callable = CodeFactory::ConstructVarargs(isolate());
352 TailCallStub(callable, context, target, new_target, args_count, elements,
353 length);
354 }
355 }
356
357 BIND(&if_double);
358 {
359 GotoIf(Word32Equal(var_length.value(), Int32Constant(0)), &if_smiorobject);
360 CallOrConstructDoubleVarargs(target, new_target, CAST(var_elements.value()),
361 var_length.value(), args_count, context,
362 var_elements_kind.value());
363 }
364 }
365
TF_BUILTIN(CallWithArrayLike,CallOrConstructBuiltinsAssembler)366 TF_BUILTIN(CallWithArrayLike, CallOrConstructBuiltinsAssembler) {
367 TNode<Object> target = CAST(Parameter(Descriptor::kTarget));
368 SloppyTNode<Object> new_target = nullptr;
369 TNode<Object> arguments_list = CAST(Parameter(Descriptor::kArgumentsList));
370 TNode<Context> context = CAST(Parameter(Descriptor::kContext));
371 CallOrConstructWithArrayLike(target, new_target, arguments_list, context);
372 }
373
TF_BUILTIN(CallWithSpread,CallOrConstructBuiltinsAssembler)374 TF_BUILTIN(CallWithSpread, CallOrConstructBuiltinsAssembler) {
375 TNode<Object> target = CAST(Parameter(Descriptor::kTarget));
376 SloppyTNode<Object> new_target = nullptr;
377 TNode<Object> spread = CAST(Parameter(Descriptor::kSpread));
378 TNode<Int32T> args_count =
379 UncheckedCast<Int32T>(Parameter(Descriptor::kArgumentsCount));
380 TNode<Context> context = CAST(Parameter(Descriptor::kContext));
381 CallOrConstructWithSpread(target, new_target, spread, args_count, context);
382 }
383
384 } // namespace internal
385 } // namespace v8
386