1 // Copyright 2014 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/runtime/runtime-utils.h"
6
7 #include "src/arguments.h"
8 #include "src/debug/debug-evaluate.h"
9 #include "src/debug/debug-frames.h"
10 #include "src/debug/debug-scopes.h"
11 #include "src/debug/debug.h"
12 #include "src/frames-inl.h"
13 #include "src/interpreter/bytecodes.h"
14 #include "src/interpreter/interpreter.h"
15 #include "src/isolate-inl.h"
16 #include "src/runtime/runtime.h"
17
18 namespace v8 {
19 namespace internal {
20
RUNTIME_FUNCTION(Runtime_DebugBreak)21 RUNTIME_FUNCTION(Runtime_DebugBreak) {
22 SealHandleScope shs(isolate);
23 DCHECK(args.length() == 1);
24 CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
25 isolate->debug()->set_return_value(value);
26
27 // Get the top-most JavaScript frame.
28 JavaScriptFrameIterator it(isolate);
29 isolate->debug()->Break(it.frame());
30
31 isolate->debug()->SetAfterBreakTarget(it.frame());
32 return *isolate->debug()->return_value();
33 }
34
RUNTIME_FUNCTION(Runtime_DebugBreakOnBytecode)35 RUNTIME_FUNCTION(Runtime_DebugBreakOnBytecode) {
36 SealHandleScope shs(isolate);
37 DCHECK(args.length() == 1);
38 CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
39 isolate->debug()->set_return_value(value);
40
41 // Get the top-most JavaScript frame.
42 JavaScriptFrameIterator it(isolate);
43 isolate->debug()->Break(it.frame());
44
45 // If live-edit has dropped frames, we are not going back to dispatch.
46 if (LiveEdit::SetAfterBreakTarget(isolate->debug())) return Smi::FromInt(0);
47
48 // Return the handler from the original bytecode array.
49 DCHECK(it.frame()->is_interpreted());
50 InterpretedFrame* interpreted_frame =
51 reinterpret_cast<InterpretedFrame*>(it.frame());
52 SharedFunctionInfo* shared = interpreted_frame->function()->shared();
53 BytecodeArray* bytecode_array = shared->bytecode_array();
54 int bytecode_offset = interpreted_frame->GetBytecodeOffset();
55 interpreter::Bytecode bytecode =
56 interpreter::Bytecodes::FromByte(bytecode_array->get(bytecode_offset));
57 return isolate->interpreter()->GetBytecodeHandler(
58 bytecode, interpreter::OperandScale::kSingle);
59 }
60
61
RUNTIME_FUNCTION(Runtime_HandleDebuggerStatement)62 RUNTIME_FUNCTION(Runtime_HandleDebuggerStatement) {
63 SealHandleScope shs(isolate);
64 DCHECK(args.length() == 0);
65 if (isolate->debug()->break_points_active()) {
66 isolate->debug()->HandleDebugBreak();
67 }
68 return isolate->heap()->undefined_value();
69 }
70
71
72 // Adds a JavaScript function as a debug event listener.
73 // args[0]: debug event listener function to set or null or undefined for
74 // clearing the event listener function
75 // args[1]: object supplied during callback
RUNTIME_FUNCTION(Runtime_SetDebugEventListener)76 RUNTIME_FUNCTION(Runtime_SetDebugEventListener) {
77 SealHandleScope shs(isolate);
78 DCHECK(args.length() == 2);
79 RUNTIME_ASSERT(args[0]->IsJSFunction() || args[0]->IsUndefined(isolate) ||
80 args[0]->IsNull(isolate));
81 CONVERT_ARG_HANDLE_CHECKED(Object, callback, 0);
82 CONVERT_ARG_HANDLE_CHECKED(Object, data, 1);
83 isolate->debug()->SetEventListener(callback, data);
84
85 return isolate->heap()->undefined_value();
86 }
87
88
RUNTIME_FUNCTION(Runtime_ScheduleBreak)89 RUNTIME_FUNCTION(Runtime_ScheduleBreak) {
90 SealHandleScope shs(isolate);
91 DCHECK(args.length() == 0);
92 isolate->stack_guard()->RequestDebugBreak();
93 return isolate->heap()->undefined_value();
94 }
95
96
DebugGetProperty(LookupIterator * it,bool * has_caught=NULL)97 static Handle<Object> DebugGetProperty(LookupIterator* it,
98 bool* has_caught = NULL) {
99 for (; it->IsFound(); it->Next()) {
100 switch (it->state()) {
101 case LookupIterator::NOT_FOUND:
102 case LookupIterator::TRANSITION:
103 UNREACHABLE();
104 case LookupIterator::ACCESS_CHECK:
105 // Ignore access checks.
106 break;
107 case LookupIterator::INTEGER_INDEXED_EXOTIC:
108 case LookupIterator::INTERCEPTOR:
109 case LookupIterator::JSPROXY:
110 return it->isolate()->factory()->undefined_value();
111 case LookupIterator::ACCESSOR: {
112 Handle<Object> accessors = it->GetAccessors();
113 if (!accessors->IsAccessorInfo()) {
114 return it->isolate()->factory()->undefined_value();
115 }
116 MaybeHandle<Object> maybe_result =
117 JSObject::GetPropertyWithAccessor(it);
118 Handle<Object> result;
119 if (!maybe_result.ToHandle(&result)) {
120 result = handle(it->isolate()->pending_exception(), it->isolate());
121 it->isolate()->clear_pending_exception();
122 if (has_caught != NULL) *has_caught = true;
123 }
124 return result;
125 }
126
127 case LookupIterator::DATA:
128 return it->GetDataValue();
129 }
130 }
131
132 return it->isolate()->factory()->undefined_value();
133 }
134
135
DebugGetProperty(Handle<Object> object,Handle<Name> name)136 static Handle<Object> DebugGetProperty(Handle<Object> object,
137 Handle<Name> name) {
138 LookupIterator it(object, name);
139 return DebugGetProperty(&it);
140 }
141
142
143 template <class IteratorType>
GetIteratorInternalProperties(Isolate * isolate,Handle<IteratorType> object)144 static MaybeHandle<JSArray> GetIteratorInternalProperties(
145 Isolate* isolate, Handle<IteratorType> object) {
146 Factory* factory = isolate->factory();
147 Handle<IteratorType> iterator = Handle<IteratorType>::cast(object);
148 CHECK(iterator->kind()->IsSmi());
149 const char* kind = NULL;
150 switch (Smi::cast(iterator->kind())->value()) {
151 case IteratorType::kKindKeys:
152 kind = "keys";
153 break;
154 case IteratorType::kKindValues:
155 kind = "values";
156 break;
157 case IteratorType::kKindEntries:
158 kind = "entries";
159 break;
160 default:
161 UNREACHABLE();
162 }
163
164 Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
165 Handle<String> has_more =
166 factory->NewStringFromAsciiChecked("[[IteratorHasMore]]");
167 result->set(0, *has_more);
168 result->set(1, isolate->heap()->ToBoolean(iterator->HasMore()));
169
170 Handle<String> index =
171 factory->NewStringFromAsciiChecked("[[IteratorIndex]]");
172 result->set(2, *index);
173 result->set(3, iterator->index());
174
175 Handle<String> iterator_kind =
176 factory->NewStringFromAsciiChecked("[[IteratorKind]]");
177 result->set(4, *iterator_kind);
178 Handle<String> kind_str = factory->NewStringFromAsciiChecked(kind);
179 result->set(5, *kind_str);
180 return factory->NewJSArrayWithElements(result);
181 }
182
183
GetInternalProperties(Isolate * isolate,Handle<Object> object)184 MaybeHandle<JSArray> Runtime::GetInternalProperties(Isolate* isolate,
185 Handle<Object> object) {
186 Factory* factory = isolate->factory();
187 if (object->IsJSBoundFunction()) {
188 Handle<JSBoundFunction> function = Handle<JSBoundFunction>::cast(object);
189
190 Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
191 Handle<String> target =
192 factory->NewStringFromAsciiChecked("[[TargetFunction]]");
193 result->set(0, *target);
194 result->set(1, function->bound_target_function());
195
196 Handle<String> bound_this =
197 factory->NewStringFromAsciiChecked("[[BoundThis]]");
198 result->set(2, *bound_this);
199 result->set(3, function->bound_this());
200
201 Handle<String> bound_args =
202 factory->NewStringFromAsciiChecked("[[BoundArgs]]");
203 result->set(4, *bound_args);
204 Handle<FixedArray> bound_arguments =
205 factory->CopyFixedArray(handle(function->bound_arguments(), isolate));
206 Handle<JSArray> arguments_array =
207 factory->NewJSArrayWithElements(bound_arguments);
208 result->set(5, *arguments_array);
209 return factory->NewJSArrayWithElements(result);
210 } else if (object->IsJSMapIterator()) {
211 Handle<JSMapIterator> iterator = Handle<JSMapIterator>::cast(object);
212 return GetIteratorInternalProperties(isolate, iterator);
213 } else if (object->IsJSSetIterator()) {
214 Handle<JSSetIterator> iterator = Handle<JSSetIterator>::cast(object);
215 return GetIteratorInternalProperties(isolate, iterator);
216 } else if (object->IsJSGeneratorObject()) {
217 Handle<JSGeneratorObject> generator =
218 Handle<JSGeneratorObject>::cast(object);
219
220 const char* status = "suspended";
221 if (generator->is_closed()) {
222 status = "closed";
223 } else if (generator->is_executing()) {
224 status = "running";
225 } else {
226 DCHECK(generator->is_suspended());
227 }
228
229 Handle<FixedArray> result = factory->NewFixedArray(2 * 3);
230 Handle<String> generator_status =
231 factory->NewStringFromAsciiChecked("[[GeneratorStatus]]");
232 result->set(0, *generator_status);
233 Handle<String> status_str = factory->NewStringFromAsciiChecked(status);
234 result->set(1, *status_str);
235
236 Handle<String> function =
237 factory->NewStringFromAsciiChecked("[[GeneratorFunction]]");
238 result->set(2, *function);
239 result->set(3, generator->function());
240
241 Handle<String> receiver =
242 factory->NewStringFromAsciiChecked("[[GeneratorReceiver]]");
243 result->set(4, *receiver);
244 result->set(5, generator->receiver());
245 return factory->NewJSArrayWithElements(result);
246 } else if (object->IsJSPromise()) {
247 Handle<JSObject> promise = Handle<JSObject>::cast(object);
248
249 Handle<Object> status_obj =
250 DebugGetProperty(promise, isolate->factory()->promise_state_symbol());
251 CHECK(status_obj->IsSmi());
252 const char* status = "rejected";
253 int status_val = Handle<Smi>::cast(status_obj)->value();
254 switch (status_val) {
255 case +1:
256 status = "resolved";
257 break;
258 case 0:
259 status = "pending";
260 break;
261 default:
262 DCHECK_EQ(-1, status_val);
263 }
264
265 Handle<FixedArray> result = factory->NewFixedArray(2 * 2);
266 Handle<String> promise_status =
267 factory->NewStringFromAsciiChecked("[[PromiseStatus]]");
268 result->set(0, *promise_status);
269 Handle<String> status_str = factory->NewStringFromAsciiChecked(status);
270 result->set(1, *status_str);
271
272 Handle<Object> value_obj =
273 DebugGetProperty(promise, isolate->factory()->promise_result_symbol());
274 Handle<String> promise_value =
275 factory->NewStringFromAsciiChecked("[[PromiseValue]]");
276 result->set(2, *promise_value);
277 result->set(3, *value_obj);
278 return factory->NewJSArrayWithElements(result);
279 } else if (object->IsJSProxy()) {
280 Handle<JSProxy> js_proxy = Handle<JSProxy>::cast(object);
281 Handle<FixedArray> result = factory->NewFixedArray(3 * 2);
282
283 Handle<String> handler_str =
284 factory->NewStringFromAsciiChecked("[[Handler]]");
285 result->set(0, *handler_str);
286 result->set(1, js_proxy->handler());
287
288 Handle<String> target_str =
289 factory->NewStringFromAsciiChecked("[[Target]]");
290 result->set(2, *target_str);
291 result->set(3, js_proxy->target());
292
293 Handle<String> is_revoked_str =
294 factory->NewStringFromAsciiChecked("[[IsRevoked]]");
295 result->set(4, *is_revoked_str);
296 result->set(5, isolate->heap()->ToBoolean(js_proxy->IsRevoked()));
297 return factory->NewJSArrayWithElements(result);
298 } else if (object->IsJSValue()) {
299 Handle<JSValue> js_value = Handle<JSValue>::cast(object);
300
301 Handle<FixedArray> result = factory->NewFixedArray(2);
302 Handle<String> primitive_value =
303 factory->NewStringFromAsciiChecked("[[PrimitiveValue]]");
304 result->set(0, *primitive_value);
305 result->set(1, js_value->value());
306 return factory->NewJSArrayWithElements(result);
307 }
308 return factory->NewJSArray(0);
309 }
310
311
RUNTIME_FUNCTION(Runtime_DebugGetInternalProperties)312 RUNTIME_FUNCTION(Runtime_DebugGetInternalProperties) {
313 HandleScope scope(isolate);
314 DCHECK(args.length() == 1);
315 CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
316 RETURN_RESULT_OR_FAILURE(isolate,
317 Runtime::GetInternalProperties(isolate, obj));
318 }
319
320
321 // Get debugger related details for an object property, in the following format:
322 // 0: Property value
323 // 1: Property details
324 // 2: Property value is exception
325 // 3: Getter function if defined
326 // 4: Setter function if defined
327 // Items 2-4 are only filled if the property has either a getter or a setter.
RUNTIME_FUNCTION(Runtime_DebugGetPropertyDetails)328 RUNTIME_FUNCTION(Runtime_DebugGetPropertyDetails) {
329 HandleScope scope(isolate);
330
331 DCHECK(args.length() == 2);
332
333 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
334 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
335
336 // Make sure to set the current context to the context before the debugger was
337 // entered (if the debugger is entered). The reason for switching context here
338 // is that for some property lookups (accessors and interceptors) callbacks
339 // into the embedding application can occour, and the embedding application
340 // could have the assumption that its own native context is the current
341 // context and not some internal debugger context.
342 SaveContext save(isolate);
343 if (isolate->debug()->in_debug_scope()) {
344 isolate->set_context(*isolate->debug()->debugger_entry()->GetContext());
345 }
346
347 // Check if the name is trivially convertible to an index and get the element
348 // if so.
349 uint32_t index;
350 // TODO(verwaest): Make sure DebugGetProperty can handle arrays, and remove
351 // this special case.
352 if (name->AsArrayIndex(&index)) {
353 Handle<FixedArray> details = isolate->factory()->NewFixedArray(2);
354 Handle<Object> element_or_char;
355 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
356 isolate, element_or_char, JSReceiver::GetElement(isolate, obj, index));
357 details->set(0, *element_or_char);
358 details->set(1, PropertyDetails::Empty().AsSmi());
359 return *isolate->factory()->NewJSArrayWithElements(details);
360 }
361
362 LookupIterator it(obj, name, LookupIterator::OWN);
363 bool has_caught = false;
364 Handle<Object> value = DebugGetProperty(&it, &has_caught);
365 if (!it.IsFound()) return isolate->heap()->undefined_value();
366
367 Handle<Object> maybe_pair;
368 if (it.state() == LookupIterator::ACCESSOR) {
369 maybe_pair = it.GetAccessors();
370 }
371
372 // If the callback object is a fixed array then it contains JavaScript
373 // getter and/or setter.
374 bool has_js_accessors = !maybe_pair.is_null() && maybe_pair->IsAccessorPair();
375 Handle<FixedArray> details =
376 isolate->factory()->NewFixedArray(has_js_accessors ? 6 : 3);
377 details->set(0, *value);
378 // TODO(verwaest): Get rid of this random way of handling interceptors.
379 PropertyDetails d = it.state() == LookupIterator::INTERCEPTOR
380 ? PropertyDetails::Empty()
381 : it.property_details();
382 details->set(1, d.AsSmi());
383 details->set(
384 2, isolate->heap()->ToBoolean(it.state() == LookupIterator::INTERCEPTOR));
385 if (has_js_accessors) {
386 Handle<AccessorPair> accessors = Handle<AccessorPair>::cast(maybe_pair);
387 details->set(3, isolate->heap()->ToBoolean(has_caught));
388 Handle<Object> getter =
389 AccessorPair::GetComponent(accessors, ACCESSOR_GETTER);
390 Handle<Object> setter =
391 AccessorPair::GetComponent(accessors, ACCESSOR_SETTER);
392 details->set(4, *getter);
393 details->set(5, *setter);
394 }
395
396 return *isolate->factory()->NewJSArrayWithElements(details);
397 }
398
399
RUNTIME_FUNCTION(Runtime_DebugGetProperty)400 RUNTIME_FUNCTION(Runtime_DebugGetProperty) {
401 HandleScope scope(isolate);
402
403 DCHECK(args.length() == 2);
404
405 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
406 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
407
408 LookupIterator it(obj, name);
409 return *DebugGetProperty(&it);
410 }
411
412
413 // Return the property type calculated from the property details.
414 // args[0]: smi with property details.
RUNTIME_FUNCTION(Runtime_DebugPropertyTypeFromDetails)415 RUNTIME_FUNCTION(Runtime_DebugPropertyTypeFromDetails) {
416 SealHandleScope shs(isolate);
417 DCHECK(args.length() == 1);
418 CONVERT_PROPERTY_DETAILS_CHECKED(details, 0);
419 return Smi::FromInt(static_cast<int>(details.type()));
420 }
421
422
423 // Return the property attribute calculated from the property details.
424 // args[0]: smi with property details.
RUNTIME_FUNCTION(Runtime_DebugPropertyAttributesFromDetails)425 RUNTIME_FUNCTION(Runtime_DebugPropertyAttributesFromDetails) {
426 SealHandleScope shs(isolate);
427 DCHECK(args.length() == 1);
428 CONVERT_PROPERTY_DETAILS_CHECKED(details, 0);
429 return Smi::FromInt(static_cast<int>(details.attributes()));
430 }
431
432
RUNTIME_FUNCTION(Runtime_CheckExecutionState)433 RUNTIME_FUNCTION(Runtime_CheckExecutionState) {
434 SealHandleScope shs(isolate);
435 DCHECK(args.length() == 1);
436 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
437 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
438 return isolate->heap()->true_value();
439 }
440
441
RUNTIME_FUNCTION(Runtime_GetFrameCount)442 RUNTIME_FUNCTION(Runtime_GetFrameCount) {
443 HandleScope scope(isolate);
444 DCHECK(args.length() == 1);
445 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
446 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
447
448 // Count all frames which are relevant to debugging stack trace.
449 int n = 0;
450 StackFrame::Id id = isolate->debug()->break_frame_id();
451 if (id == StackFrame::NO_ID) {
452 // If there is no JavaScript stack frame count is 0.
453 return Smi::FromInt(0);
454 }
455
456 for (JavaScriptFrameIterator it(isolate, id); !it.done(); it.Advance()) {
457 List<FrameSummary> frames(FLAG_max_inlining_levels + 1);
458 it.frame()->Summarize(&frames);
459 for (int i = frames.length() - 1; i >= 0; i--) {
460 // Omit functions from native and extension scripts.
461 if (frames[i].function()->shared()->IsSubjectToDebugging()) n++;
462 }
463 }
464 return Smi::FromInt(n);
465 }
466
467
468 static const int kFrameDetailsFrameIdIndex = 0;
469 static const int kFrameDetailsReceiverIndex = 1;
470 static const int kFrameDetailsFunctionIndex = 2;
471 static const int kFrameDetailsArgumentCountIndex = 3;
472 static const int kFrameDetailsLocalCountIndex = 4;
473 static const int kFrameDetailsSourcePositionIndex = 5;
474 static const int kFrameDetailsConstructCallIndex = 6;
475 static const int kFrameDetailsAtReturnIndex = 7;
476 static const int kFrameDetailsFlagsIndex = 8;
477 static const int kFrameDetailsFirstDynamicIndex = 9;
478
479
480 // Return an array with frame details
481 // args[0]: number: break id
482 // args[1]: number: frame index
483 //
484 // The array returned contains the following information:
485 // 0: Frame id
486 // 1: Receiver
487 // 2: Function
488 // 3: Argument count
489 // 4: Local count
490 // 5: Source position
491 // 6: Constructor call
492 // 7: Is at return
493 // 8: Flags
494 // Arguments name, value
495 // Locals name, value
496 // Return value if any
RUNTIME_FUNCTION(Runtime_GetFrameDetails)497 RUNTIME_FUNCTION(Runtime_GetFrameDetails) {
498 HandleScope scope(isolate);
499 DCHECK(args.length() == 2);
500 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
501 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
502
503 CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
504 Heap* heap = isolate->heap();
505
506 // Find the relevant frame with the requested index.
507 StackFrame::Id id = isolate->debug()->break_frame_id();
508 if (id == StackFrame::NO_ID) {
509 // If there are no JavaScript stack frames return undefined.
510 return heap->undefined_value();
511 }
512
513 JavaScriptFrameIterator it(isolate, id);
514 // Inlined frame index in optimized frame, starting from outer function.
515 int inlined_jsframe_index =
516 DebugFrameHelper::FindIndexedNonNativeFrame(&it, index);
517 if (inlined_jsframe_index == -1) return heap->undefined_value();
518
519 FrameInspector frame_inspector(it.frame(), inlined_jsframe_index, isolate);
520 bool is_optimized = it.frame()->is_optimized();
521
522 // Traverse the saved contexts chain to find the active context for the
523 // selected frame.
524 SaveContext* save =
525 DebugFrameHelper::FindSavedContextForFrame(isolate, it.frame());
526
527 // Get the frame id.
528 Handle<Object> frame_id(DebugFrameHelper::WrapFrameId(it.frame()->id()),
529 isolate);
530
531 // Find source position in unoptimized code.
532 int position = frame_inspector.GetSourcePosition();
533
534 // Check for constructor frame.
535 bool constructor = frame_inspector.IsConstructor();
536
537 // Get scope info and read from it for local variable information.
538 Handle<JSFunction> function =
539 Handle<JSFunction>::cast(frame_inspector.GetFunction());
540 RUNTIME_ASSERT(function->shared()->IsSubjectToDebugging());
541 Handle<SharedFunctionInfo> shared(function->shared());
542 Handle<ScopeInfo> scope_info(shared->scope_info());
543 DCHECK(*scope_info != ScopeInfo::Empty(isolate));
544
545 // Get the locals names and values into a temporary array.
546 int local_count = scope_info->LocalCount();
547 for (int slot = 0; slot < scope_info->LocalCount(); ++slot) {
548 // Hide compiler-introduced temporary variables, whether on the stack or on
549 // the context.
550 if (ScopeInfo::VariableIsSynthetic(scope_info->LocalName(slot))) {
551 local_count--;
552 }
553 }
554
555 Handle<FixedArray> locals =
556 isolate->factory()->NewFixedArray(local_count * 2);
557
558 // Fill in the values of the locals.
559 int local = 0;
560 int i = 0;
561 for (; i < scope_info->StackLocalCount(); ++i) {
562 // Use the value from the stack.
563 if (ScopeInfo::VariableIsSynthetic(scope_info->LocalName(i))) continue;
564 locals->set(local * 2, scope_info->LocalName(i));
565 Handle<Object> value =
566 frame_inspector.GetExpression(scope_info->StackLocalIndex(i));
567 // TODO(yangguo): We convert optimized out values to {undefined} when they
568 // are passed to the debugger. Eventually we should handle them somehow.
569 if (value->IsOptimizedOut(isolate)) {
570 value = isolate->factory()->undefined_value();
571 }
572 locals->set(local * 2 + 1, *value);
573 local++;
574 }
575 if (local < local_count) {
576 // Get the context containing declarations.
577 Handle<Context> context(
578 Handle<Context>::cast(frame_inspector.GetContext())->closure_context());
579 for (; i < scope_info->LocalCount(); ++i) {
580 Handle<String> name(scope_info->LocalName(i));
581 if (ScopeInfo::VariableIsSynthetic(*name)) continue;
582 VariableMode mode;
583 InitializationFlag init_flag;
584 MaybeAssignedFlag maybe_assigned_flag;
585 locals->set(local * 2, *name);
586 int context_slot_index = ScopeInfo::ContextSlotIndex(
587 scope_info, name, &mode, &init_flag, &maybe_assigned_flag);
588 Object* value = context->get(context_slot_index);
589 locals->set(local * 2 + 1, value);
590 local++;
591 }
592 }
593
594 // Check whether this frame is positioned at return. If not top
595 // frame or if the frame is optimized it cannot be at a return.
596 bool at_return = false;
597 if (!is_optimized && index == 0) {
598 at_return = isolate->debug()->IsBreakAtReturn(it.frame());
599 }
600
601 // If positioned just before return find the value to be returned and add it
602 // to the frame information.
603 Handle<Object> return_value = isolate->factory()->undefined_value();
604 if (at_return) {
605 return_value = isolate->debug()->return_value();
606 }
607
608 // Now advance to the arguments adapter frame (if any). It contains all
609 // the provided parameters whereas the function frame always have the number
610 // of arguments matching the functions parameters. The rest of the
611 // information (except for what is collected above) is the same.
612 if ((inlined_jsframe_index == 0) && it.frame()->has_adapted_arguments()) {
613 it.AdvanceToArgumentsFrame();
614 frame_inspector.SetArgumentsFrame(it.frame());
615 }
616
617 // Find the number of arguments to fill. At least fill the number of
618 // parameters for the function and fill more if more parameters are provided.
619 int argument_count = scope_info->ParameterCount();
620 if (argument_count < frame_inspector.GetParametersCount()) {
621 argument_count = frame_inspector.GetParametersCount();
622 }
623
624 // Calculate the size of the result.
625 int details_size = kFrameDetailsFirstDynamicIndex +
626 2 * (argument_count + local_count) + (at_return ? 1 : 0);
627 Handle<FixedArray> details = isolate->factory()->NewFixedArray(details_size);
628
629 // Add the frame id.
630 details->set(kFrameDetailsFrameIdIndex, *frame_id);
631
632 // Add the function (same as in function frame).
633 details->set(kFrameDetailsFunctionIndex, *(frame_inspector.GetFunction()));
634
635 // Add the arguments count.
636 details->set(kFrameDetailsArgumentCountIndex, Smi::FromInt(argument_count));
637
638 // Add the locals count
639 details->set(kFrameDetailsLocalCountIndex, Smi::FromInt(local_count));
640
641 // Add the source position.
642 if (position != RelocInfo::kNoPosition) {
643 details->set(kFrameDetailsSourcePositionIndex, Smi::FromInt(position));
644 } else {
645 details->set(kFrameDetailsSourcePositionIndex, heap->undefined_value());
646 }
647
648 // Add the constructor information.
649 details->set(kFrameDetailsConstructCallIndex, heap->ToBoolean(constructor));
650
651 // Add the at return information.
652 details->set(kFrameDetailsAtReturnIndex, heap->ToBoolean(at_return));
653
654 // Add flags to indicate information on whether this frame is
655 // bit 0: invoked in the debugger context.
656 // bit 1: optimized frame.
657 // bit 2: inlined in optimized frame
658 int flags = 0;
659 if (*save->context() == *isolate->debug()->debug_context()) {
660 flags |= 1 << 0;
661 }
662 if (is_optimized) {
663 flags |= 1 << 1;
664 flags |= inlined_jsframe_index << 2;
665 }
666 details->set(kFrameDetailsFlagsIndex, Smi::FromInt(flags));
667
668 // Fill the dynamic part.
669 int details_index = kFrameDetailsFirstDynamicIndex;
670
671 // Add arguments name and value.
672 for (int i = 0; i < argument_count; i++) {
673 // Name of the argument.
674 if (i < scope_info->ParameterCount()) {
675 details->set(details_index++, scope_info->ParameterName(i));
676 } else {
677 details->set(details_index++, heap->undefined_value());
678 }
679
680 // Parameter value.
681 if (i < frame_inspector.GetParametersCount()) {
682 // Get the value from the stack.
683 details->set(details_index++, *(frame_inspector.GetParameter(i)));
684 } else {
685 details->set(details_index++, heap->undefined_value());
686 }
687 }
688
689 // Add locals name and value from the temporary copy from the function frame.
690 for (int i = 0; i < local_count * 2; i++) {
691 details->set(details_index++, locals->get(i));
692 }
693
694 // Add the value being returned.
695 if (at_return) {
696 details->set(details_index++, *return_value);
697 }
698
699 // Add the receiver (same as in function frame).
700 Handle<Object> receiver(it.frame()->receiver(), isolate);
701 DCHECK(!function->shared()->IsBuiltin());
702 DCHECK_IMPLIES(is_sloppy(shared->language_mode()), receiver->IsJSReceiver());
703 details->set(kFrameDetailsReceiverIndex, *receiver);
704
705 DCHECK_EQ(details_size, details_index);
706 return *isolate->factory()->NewJSArrayWithElements(details);
707 }
708
709
RUNTIME_FUNCTION(Runtime_GetScopeCount)710 RUNTIME_FUNCTION(Runtime_GetScopeCount) {
711 HandleScope scope(isolate);
712 DCHECK(args.length() == 2);
713 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
714 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
715
716 CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
717
718 // Get the frame where the debugging is performed.
719 StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
720 JavaScriptFrameIterator it(isolate, id);
721 JavaScriptFrame* frame = it.frame();
722 FrameInspector frame_inspector(frame, 0, isolate);
723
724 // Count the visible scopes.
725 int n = 0;
726 for (ScopeIterator it(isolate, &frame_inspector); !it.Done(); it.Next()) {
727 n++;
728 }
729
730 return Smi::FromInt(n);
731 }
732
733
734 // Return an array with scope details
735 // args[0]: number: break id
736 // args[1]: number: frame index
737 // args[2]: number: inlined frame index
738 // args[3]: number: scope index
739 //
740 // The array returned contains the following information:
741 // 0: Scope type
742 // 1: Scope object
RUNTIME_FUNCTION(Runtime_GetScopeDetails)743 RUNTIME_FUNCTION(Runtime_GetScopeDetails) {
744 HandleScope scope(isolate);
745 DCHECK(args.length() == 4);
746 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
747 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
748
749 CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
750 CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
751 CONVERT_NUMBER_CHECKED(int, index, Int32, args[3]);
752
753 // Get the frame where the debugging is performed.
754 StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
755 JavaScriptFrameIterator frame_it(isolate, id);
756 JavaScriptFrame* frame = frame_it.frame();
757 FrameInspector frame_inspector(frame, inlined_jsframe_index, isolate);
758
759 // Find the requested scope.
760 int n = 0;
761 ScopeIterator it(isolate, &frame_inspector);
762 for (; !it.Done() && n < index; it.Next()) {
763 n++;
764 }
765 if (it.Done()) {
766 return isolate->heap()->undefined_value();
767 }
768 RETURN_RESULT_OR_FAILURE(isolate, it.MaterializeScopeDetails());
769 }
770
771
772 // Return an array of scope details
773 // args[0]: number: break id
774 // args[1]: number: frame index
775 // args[2]: number: inlined frame index
776 // args[3]: boolean: ignore nested scopes
777 //
778 // The array returned contains arrays with the following information:
779 // 0: Scope type
780 // 1: Scope object
RUNTIME_FUNCTION(Runtime_GetAllScopesDetails)781 RUNTIME_FUNCTION(Runtime_GetAllScopesDetails) {
782 HandleScope scope(isolate);
783 DCHECK(args.length() == 3 || args.length() == 4);
784 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
785 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
786
787 CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
788 CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
789
790 ScopeIterator::Option option = ScopeIterator::DEFAULT;
791 if (args.length() == 4) {
792 CONVERT_BOOLEAN_ARG_CHECKED(flag, 3);
793 if (flag) option = ScopeIterator::IGNORE_NESTED_SCOPES;
794 }
795
796 // Get the frame where the debugging is performed.
797 StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
798 JavaScriptFrameIterator frame_it(isolate, id);
799 JavaScriptFrame* frame = frame_it.frame();
800 FrameInspector frame_inspector(frame, inlined_jsframe_index, isolate);
801
802 List<Handle<JSObject> > result(4);
803 ScopeIterator it(isolate, &frame_inspector, option);
804 for (; !it.Done(); it.Next()) {
805 Handle<JSObject> details;
806 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, details,
807 it.MaterializeScopeDetails());
808 result.Add(details);
809 }
810
811 Handle<FixedArray> array = isolate->factory()->NewFixedArray(result.length());
812 for (int i = 0; i < result.length(); ++i) {
813 array->set(i, *result[i]);
814 }
815 return *isolate->factory()->NewJSArrayWithElements(array);
816 }
817
818
RUNTIME_FUNCTION(Runtime_GetFunctionScopeCount)819 RUNTIME_FUNCTION(Runtime_GetFunctionScopeCount) {
820 HandleScope scope(isolate);
821 DCHECK_EQ(1, args.length());
822
823 // Check arguments.
824 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);
825
826 // Count the visible scopes.
827 int n = 0;
828 if (function->IsJSFunction()) {
829 for (ScopeIterator it(isolate, Handle<JSFunction>::cast(function));
830 !it.Done(); it.Next()) {
831 n++;
832 }
833 }
834
835 return Smi::FromInt(n);
836 }
837
838
RUNTIME_FUNCTION(Runtime_GetFunctionScopeDetails)839 RUNTIME_FUNCTION(Runtime_GetFunctionScopeDetails) {
840 HandleScope scope(isolate);
841 DCHECK(args.length() == 2);
842
843 // Check arguments.
844 CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
845 CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
846
847 // Find the requested scope.
848 int n = 0;
849 ScopeIterator it(isolate, fun);
850 for (; !it.Done() && n < index; it.Next()) {
851 n++;
852 }
853 if (it.Done()) {
854 return isolate->heap()->undefined_value();
855 }
856
857 RETURN_RESULT_OR_FAILURE(isolate, it.MaterializeScopeDetails());
858 }
859
860
SetScopeVariableValue(ScopeIterator * it,int index,Handle<String> variable_name,Handle<Object> new_value)861 static bool SetScopeVariableValue(ScopeIterator* it, int index,
862 Handle<String> variable_name,
863 Handle<Object> new_value) {
864 for (int n = 0; !it->Done() && n < index; it->Next()) {
865 n++;
866 }
867 if (it->Done()) {
868 return false;
869 }
870 return it->SetVariableValue(variable_name, new_value);
871 }
872
873
874 // Change variable value in closure or local scope
875 // args[0]: number or JsFunction: break id or function
876 // args[1]: number: frame index (when arg[0] is break id)
877 // args[2]: number: inlined frame index (when arg[0] is break id)
878 // args[3]: number: scope index
879 // args[4]: string: variable name
880 // args[5]: object: new value
881 //
882 // Return true if success and false otherwise
RUNTIME_FUNCTION(Runtime_SetScopeVariableValue)883 RUNTIME_FUNCTION(Runtime_SetScopeVariableValue) {
884 HandleScope scope(isolate);
885 DCHECK(args.length() == 6);
886
887 // Check arguments.
888 CONVERT_NUMBER_CHECKED(int, index, Int32, args[3]);
889 CONVERT_ARG_HANDLE_CHECKED(String, variable_name, 4);
890 CONVERT_ARG_HANDLE_CHECKED(Object, new_value, 5);
891
892 bool res;
893 if (args[0]->IsNumber()) {
894 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
895 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
896
897 CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
898 CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
899
900 // Get the frame where the debugging is performed.
901 StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
902 JavaScriptFrameIterator frame_it(isolate, id);
903 JavaScriptFrame* frame = frame_it.frame();
904 FrameInspector frame_inspector(frame, inlined_jsframe_index, isolate);
905
906 ScopeIterator it(isolate, &frame_inspector);
907 res = SetScopeVariableValue(&it, index, variable_name, new_value);
908 } else {
909 CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
910 ScopeIterator it(isolate, fun);
911 res = SetScopeVariableValue(&it, index, variable_name, new_value);
912 }
913
914 return isolate->heap()->ToBoolean(res);
915 }
916
917
RUNTIME_FUNCTION(Runtime_DebugPrintScopes)918 RUNTIME_FUNCTION(Runtime_DebugPrintScopes) {
919 HandleScope scope(isolate);
920 DCHECK(args.length() == 0);
921
922 #ifdef DEBUG
923 // Print the scopes for the top frame.
924 StackFrameLocator locator(isolate);
925 JavaScriptFrame* frame = locator.FindJavaScriptFrame(0);
926 FrameInspector frame_inspector(frame, 0, isolate);
927
928 for (ScopeIterator it(isolate, &frame_inspector); !it.Done(); it.Next()) {
929 it.DebugPrint();
930 }
931 #endif
932 return isolate->heap()->undefined_value();
933 }
934
935
936 // Sets the disable break state
937 // args[0]: disable break state
RUNTIME_FUNCTION(Runtime_SetBreakPointsActive)938 RUNTIME_FUNCTION(Runtime_SetBreakPointsActive) {
939 HandleScope scope(isolate);
940 DCHECK(args.length() == 1);
941 CONVERT_BOOLEAN_ARG_CHECKED(active, 0);
942 isolate->debug()->set_break_points_active(active);
943 return isolate->heap()->undefined_value();
944 }
945
946
IsPositionAlignmentCodeCorrect(int alignment)947 static bool IsPositionAlignmentCodeCorrect(int alignment) {
948 return alignment == STATEMENT_ALIGNED || alignment == BREAK_POSITION_ALIGNED;
949 }
950
951
RUNTIME_FUNCTION(Runtime_GetBreakLocations)952 RUNTIME_FUNCTION(Runtime_GetBreakLocations) {
953 HandleScope scope(isolate);
954 DCHECK(args.length() == 2);
955 RUNTIME_ASSERT(isolate->debug()->is_active());
956 CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
957 CONVERT_NUMBER_CHECKED(int32_t, statement_aligned_code, Int32, args[1]);
958
959 if (!IsPositionAlignmentCodeCorrect(statement_aligned_code)) {
960 return isolate->ThrowIllegalOperation();
961 }
962 BreakPositionAlignment alignment =
963 static_cast<BreakPositionAlignment>(statement_aligned_code);
964
965 Handle<SharedFunctionInfo> shared(fun->shared());
966 // Find the number of break points
967 Handle<Object> break_locations =
968 Debug::GetSourceBreakLocations(shared, alignment);
969 if (break_locations->IsUndefined(isolate)) {
970 return isolate->heap()->undefined_value();
971 }
972 // Return array as JS array
973 return *isolate->factory()->NewJSArrayWithElements(
974 Handle<FixedArray>::cast(break_locations));
975 }
976
977
978 // Set a break point in a function.
979 // args[0]: function
980 // args[1]: number: break source position (within the function source)
981 // args[2]: number: break point object
RUNTIME_FUNCTION(Runtime_SetFunctionBreakPoint)982 RUNTIME_FUNCTION(Runtime_SetFunctionBreakPoint) {
983 HandleScope scope(isolate);
984 DCHECK(args.length() == 3);
985 RUNTIME_ASSERT(isolate->debug()->is_active());
986 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
987 CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
988 RUNTIME_ASSERT(source_position >= function->shared()->start_position() &&
989 source_position <= function->shared()->end_position());
990 CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 2);
991
992 // Set break point.
993 RUNTIME_ASSERT(isolate->debug()->SetBreakPoint(
994 function, break_point_object_arg, &source_position));
995
996 return Smi::FromInt(source_position);
997 }
998
999
1000 // Changes the state of a break point in a script and returns source position
1001 // where break point was set. NOTE: Regarding performance see the NOTE for
1002 // GetScriptFromScriptData.
1003 // args[0]: script to set break point in
1004 // args[1]: number: break source position (within the script source)
1005 // args[2]: number, breakpoint position alignment
1006 // args[3]: number: break point object
RUNTIME_FUNCTION(Runtime_SetScriptBreakPoint)1007 RUNTIME_FUNCTION(Runtime_SetScriptBreakPoint) {
1008 HandleScope scope(isolate);
1009 DCHECK(args.length() == 4);
1010 RUNTIME_ASSERT(isolate->debug()->is_active());
1011 CONVERT_ARG_HANDLE_CHECKED(JSValue, wrapper, 0);
1012 CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
1013 RUNTIME_ASSERT(source_position >= 0);
1014 CONVERT_NUMBER_CHECKED(int32_t, statement_aligned_code, Int32, args[2]);
1015 CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 3);
1016
1017 if (!IsPositionAlignmentCodeCorrect(statement_aligned_code)) {
1018 return isolate->ThrowIllegalOperation();
1019 }
1020 BreakPositionAlignment alignment =
1021 static_cast<BreakPositionAlignment>(statement_aligned_code);
1022
1023 // Get the script from the script wrapper.
1024 RUNTIME_ASSERT(wrapper->value()->IsScript());
1025 Handle<Script> script(Script::cast(wrapper->value()));
1026
1027 // Set break point.
1028 if (!isolate->debug()->SetBreakPointForScript(script, break_point_object_arg,
1029 &source_position, alignment)) {
1030 return isolate->heap()->undefined_value();
1031 }
1032
1033 return Smi::FromInt(source_position);
1034 }
1035
1036
1037 // Clear a break point
1038 // args[0]: number: break point object
RUNTIME_FUNCTION(Runtime_ClearBreakPoint)1039 RUNTIME_FUNCTION(Runtime_ClearBreakPoint) {
1040 HandleScope scope(isolate);
1041 DCHECK(args.length() == 1);
1042 RUNTIME_ASSERT(isolate->debug()->is_active());
1043 CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 0);
1044
1045 // Clear break point.
1046 isolate->debug()->ClearBreakPoint(break_point_object_arg);
1047
1048 return isolate->heap()->undefined_value();
1049 }
1050
1051
1052 // Change the state of break on exceptions.
1053 // args[0]: Enum value indicating whether to affect caught/uncaught exceptions.
1054 // args[1]: Boolean indicating on/off.
RUNTIME_FUNCTION(Runtime_ChangeBreakOnException)1055 RUNTIME_FUNCTION(Runtime_ChangeBreakOnException) {
1056 HandleScope scope(isolate);
1057 DCHECK(args.length() == 2);
1058 CONVERT_NUMBER_CHECKED(uint32_t, type_arg, Uint32, args[0]);
1059 CONVERT_BOOLEAN_ARG_CHECKED(enable, 1);
1060
1061 // If the number doesn't match an enum value, the ChangeBreakOnException
1062 // function will default to affecting caught exceptions.
1063 ExceptionBreakType type = static_cast<ExceptionBreakType>(type_arg);
1064 // Update break point state.
1065 isolate->debug()->ChangeBreakOnException(type, enable);
1066 return isolate->heap()->undefined_value();
1067 }
1068
1069
1070 // Returns the state of break on exceptions
1071 // args[0]: boolean indicating uncaught exceptions
RUNTIME_FUNCTION(Runtime_IsBreakOnException)1072 RUNTIME_FUNCTION(Runtime_IsBreakOnException) {
1073 HandleScope scope(isolate);
1074 DCHECK(args.length() == 1);
1075 CONVERT_NUMBER_CHECKED(uint32_t, type_arg, Uint32, args[0]);
1076
1077 ExceptionBreakType type = static_cast<ExceptionBreakType>(type_arg);
1078 bool result = isolate->debug()->IsBreakOnException(type);
1079 return Smi::FromInt(result);
1080 }
1081
1082
1083 // Prepare for stepping
1084 // args[0]: break id for checking execution state
1085 // args[1]: step action from the enumeration StepAction
1086 // args[2]: number of times to perform the step, for step out it is the number
1087 // of frames to step down.
RUNTIME_FUNCTION(Runtime_PrepareStep)1088 RUNTIME_FUNCTION(Runtime_PrepareStep) {
1089 HandleScope scope(isolate);
1090 DCHECK(args.length() == 2);
1091 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
1092 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
1093
1094 if (!args[1]->IsNumber()) {
1095 return isolate->Throw(isolate->heap()->illegal_argument_string());
1096 }
1097
1098 // Get the step action and check validity.
1099 StepAction step_action = static_cast<StepAction>(NumberToInt32(args[1]));
1100 if (step_action != StepIn && step_action != StepNext &&
1101 step_action != StepOut && step_action != StepFrame) {
1102 return isolate->Throw(isolate->heap()->illegal_argument_string());
1103 }
1104
1105 // Clear all current stepping setup.
1106 isolate->debug()->ClearStepping();
1107
1108 // Prepare step.
1109 isolate->debug()->PrepareStep(static_cast<StepAction>(step_action));
1110 return isolate->heap()->undefined_value();
1111 }
1112
1113
1114 // Clear all stepping set by PrepareStep.
RUNTIME_FUNCTION(Runtime_ClearStepping)1115 RUNTIME_FUNCTION(Runtime_ClearStepping) {
1116 HandleScope scope(isolate);
1117 DCHECK(args.length() == 0);
1118 RUNTIME_ASSERT(isolate->debug()->is_active());
1119 isolate->debug()->ClearStepping();
1120 return isolate->heap()->undefined_value();
1121 }
1122
1123
RUNTIME_FUNCTION(Runtime_DebugEvaluate)1124 RUNTIME_FUNCTION(Runtime_DebugEvaluate) {
1125 HandleScope scope(isolate);
1126
1127 // Check the execution state and decode arguments frame and source to be
1128 // evaluated.
1129 DCHECK(args.length() == 6);
1130 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
1131 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
1132
1133 CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
1134 CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
1135 CONVERT_ARG_HANDLE_CHECKED(String, source, 3);
1136 CONVERT_BOOLEAN_ARG_CHECKED(disable_break, 4);
1137 CONVERT_ARG_HANDLE_CHECKED(HeapObject, context_extension, 5);
1138
1139 StackFrame::Id id = DebugFrameHelper::UnwrapFrameId(wrapped_id);
1140
1141 RETURN_RESULT_OR_FAILURE(
1142 isolate, DebugEvaluate::Local(isolate, id, inlined_jsframe_index, source,
1143 disable_break, context_extension));
1144 }
1145
1146
RUNTIME_FUNCTION(Runtime_DebugEvaluateGlobal)1147 RUNTIME_FUNCTION(Runtime_DebugEvaluateGlobal) {
1148 HandleScope scope(isolate);
1149
1150 // Check the execution state and decode arguments frame and source to be
1151 // evaluated.
1152 DCHECK(args.length() == 4);
1153 CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
1154 RUNTIME_ASSERT(isolate->debug()->CheckExecutionState(break_id));
1155
1156 CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
1157 CONVERT_BOOLEAN_ARG_CHECKED(disable_break, 2);
1158 CONVERT_ARG_HANDLE_CHECKED(HeapObject, context_extension, 3);
1159
1160 RETURN_RESULT_OR_FAILURE(
1161 isolate,
1162 DebugEvaluate::Global(isolate, source, disable_break, context_extension));
1163 }
1164
1165
RUNTIME_FUNCTION(Runtime_DebugGetLoadedScripts)1166 RUNTIME_FUNCTION(Runtime_DebugGetLoadedScripts) {
1167 HandleScope scope(isolate);
1168 DCHECK(args.length() == 0);
1169 RUNTIME_ASSERT(isolate->debug()->is_active());
1170
1171 Handle<FixedArray> instances;
1172 {
1173 DebugScope debug_scope(isolate->debug());
1174 if (debug_scope.failed()) {
1175 DCHECK(isolate->has_pending_exception());
1176 return isolate->heap()->exception();
1177 }
1178 // Fill the script objects.
1179 instances = isolate->debug()->GetLoadedScripts();
1180 }
1181
1182 // Convert the script objects to proper JS objects.
1183 for (int i = 0; i < instances->length(); i++) {
1184 Handle<Script> script = Handle<Script>(Script::cast(instances->get(i)));
1185 // Get the script wrapper in a local handle before calling GetScriptWrapper,
1186 // because using
1187 // instances->set(i, *GetScriptWrapper(script))
1188 // is unsafe as GetScriptWrapper might call GC and the C++ compiler might
1189 // already have dereferenced the instances handle.
1190 Handle<JSObject> wrapper = Script::GetWrapper(script);
1191 instances->set(i, *wrapper);
1192 }
1193
1194 // Return result as a JS array.
1195 return *isolate->factory()->NewJSArrayWithElements(instances);
1196 }
1197
HasInPrototypeChainIgnoringProxies(Isolate * isolate,JSObject * object,Object * proto)1198 static bool HasInPrototypeChainIgnoringProxies(Isolate* isolate,
1199 JSObject* object,
1200 Object* proto) {
1201 PrototypeIterator iter(isolate, object, kStartAtReceiver);
1202 while (true) {
1203 iter.AdvanceIgnoringProxies();
1204 if (iter.IsAtEnd()) return false;
1205 if (iter.GetCurrent() == proto) return true;
1206 }
1207 }
1208
1209
1210 // Scan the heap for objects with direct references to an object
1211 // args[0]: the object to find references to
1212 // args[1]: constructor function for instances to exclude (Mirror)
1213 // args[2]: the the maximum number of objects to return
RUNTIME_FUNCTION(Runtime_DebugReferencedBy)1214 RUNTIME_FUNCTION(Runtime_DebugReferencedBy) {
1215 HandleScope scope(isolate);
1216 DCHECK(args.length() == 3);
1217 CONVERT_ARG_HANDLE_CHECKED(JSObject, target, 0);
1218 CONVERT_ARG_HANDLE_CHECKED(Object, filter, 1);
1219 RUNTIME_ASSERT(filter->IsUndefined(isolate) || filter->IsJSObject());
1220 CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[2]);
1221 RUNTIME_ASSERT(max_references >= 0);
1222
1223 List<Handle<JSObject> > instances;
1224 Heap* heap = isolate->heap();
1225 {
1226 HeapIterator iterator(heap, HeapIterator::kFilterUnreachable);
1227 // Get the constructor function for context extension and arguments array.
1228 Object* arguments_fun = isolate->sloppy_arguments_map()->GetConstructor();
1229 HeapObject* heap_obj;
1230 while ((heap_obj = iterator.next())) {
1231 if (!heap_obj->IsJSObject()) continue;
1232 JSObject* obj = JSObject::cast(heap_obj);
1233 if (obj->IsJSContextExtensionObject()) continue;
1234 if (obj->map()->GetConstructor() == arguments_fun) continue;
1235 if (!obj->ReferencesObject(*target)) continue;
1236 // Check filter if supplied. This is normally used to avoid
1237 // references from mirror objects.
1238 if (!filter->IsUndefined(isolate) &&
1239 HasInPrototypeChainIgnoringProxies(isolate, obj, *filter)) {
1240 continue;
1241 }
1242 if (obj->IsJSGlobalObject()) {
1243 obj = JSGlobalObject::cast(obj)->global_proxy();
1244 }
1245 instances.Add(Handle<JSObject>(obj));
1246 if (instances.length() == max_references) break;
1247 }
1248 // Iterate the rest of the heap to satisfy HeapIterator constraints.
1249 while (iterator.next()) {
1250 }
1251 }
1252
1253 Handle<FixedArray> result;
1254 if (instances.length() == 1 && instances.last().is_identical_to(target)) {
1255 // Check for circular reference only. This can happen when the object is
1256 // only referenced from mirrors and has a circular reference in which case
1257 // the object is not really alive and would have been garbage collected if
1258 // not referenced from the mirror.
1259 result = isolate->factory()->empty_fixed_array();
1260 } else {
1261 result = isolate->factory()->NewFixedArray(instances.length());
1262 for (int i = 0; i < instances.length(); ++i) result->set(i, *instances[i]);
1263 }
1264 return *isolate->factory()->NewJSArrayWithElements(result);
1265 }
1266
1267
1268 // Scan the heap for objects constructed by a specific function.
1269 // args[0]: the constructor to find instances of
1270 // args[1]: the the maximum number of objects to return
RUNTIME_FUNCTION(Runtime_DebugConstructedBy)1271 RUNTIME_FUNCTION(Runtime_DebugConstructedBy) {
1272 HandleScope scope(isolate);
1273 DCHECK(args.length() == 2);
1274 CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 0);
1275 CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[1]);
1276 RUNTIME_ASSERT(max_references >= 0);
1277
1278 List<Handle<JSObject> > instances;
1279 Heap* heap = isolate->heap();
1280 {
1281 HeapIterator iterator(heap, HeapIterator::kFilterUnreachable);
1282 HeapObject* heap_obj;
1283 while ((heap_obj = iterator.next())) {
1284 if (!heap_obj->IsJSObject()) continue;
1285 JSObject* obj = JSObject::cast(heap_obj);
1286 if (obj->map()->GetConstructor() != *constructor) continue;
1287 instances.Add(Handle<JSObject>(obj));
1288 if (instances.length() == max_references) break;
1289 }
1290 // Iterate the rest of the heap to satisfy HeapIterator constraints.
1291 while (iterator.next()) {
1292 }
1293 }
1294
1295 Handle<FixedArray> result =
1296 isolate->factory()->NewFixedArray(instances.length());
1297 for (int i = 0; i < instances.length(); ++i) result->set(i, *instances[i]);
1298 return *isolate->factory()->NewJSArrayWithElements(result);
1299 }
1300
1301
1302 // Find the effective prototype object as returned by __proto__.
1303 // args[0]: the object to find the prototype for.
RUNTIME_FUNCTION(Runtime_DebugGetPrototype)1304 RUNTIME_FUNCTION(Runtime_DebugGetPrototype) {
1305 HandleScope shs(isolate);
1306 DCHECK(args.length() == 1);
1307 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
1308 // TODO(1543): Come up with a solution for clients to handle potential errors
1309 // thrown by an intermediate proxy.
1310 RETURN_RESULT_OR_FAILURE(isolate, JSReceiver::GetPrototype(isolate, obj));
1311 }
1312
1313
1314 // Patches script source (should be called upon BeforeCompile event).
RUNTIME_FUNCTION(Runtime_DebugSetScriptSource)1315 RUNTIME_FUNCTION(Runtime_DebugSetScriptSource) {
1316 HandleScope scope(isolate);
1317 DCHECK(args.length() == 2);
1318
1319 CONVERT_ARG_HANDLE_CHECKED(JSValue, script_wrapper, 0);
1320 CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
1321
1322 RUNTIME_ASSERT(script_wrapper->value()->IsScript());
1323 Handle<Script> script(Script::cast(script_wrapper->value()));
1324
1325 int compilation_state = script->compilation_state();
1326 RUNTIME_ASSERT(compilation_state == Script::COMPILATION_STATE_INITIAL);
1327 script->set_source(*source);
1328
1329 return isolate->heap()->undefined_value();
1330 }
1331
1332
RUNTIME_FUNCTION(Runtime_FunctionGetInferredName)1333 RUNTIME_FUNCTION(Runtime_FunctionGetInferredName) {
1334 SealHandleScope shs(isolate);
1335 DCHECK_EQ(1, args.length());
1336
1337 CONVERT_ARG_CHECKED(Object, f, 0);
1338 if (f->IsJSFunction()) {
1339 return JSFunction::cast(f)->shared()->inferred_name();
1340 }
1341 return isolate->heap()->empty_string();
1342 }
1343
1344
RUNTIME_FUNCTION(Runtime_FunctionGetDebugName)1345 RUNTIME_FUNCTION(Runtime_FunctionGetDebugName) {
1346 HandleScope scope(isolate);
1347 DCHECK_EQ(1, args.length());
1348
1349 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);
1350
1351 if (function->IsJSBoundFunction()) {
1352 RETURN_RESULT_OR_FAILURE(
1353 isolate, JSBoundFunction::GetName(
1354 isolate, Handle<JSBoundFunction>::cast(function)));
1355 } else {
1356 return *JSFunction::GetDebugName(Handle<JSFunction>::cast(function));
1357 }
1358 }
1359
1360
1361 // A testing entry. Returns statement position which is the closest to
1362 // source_position.
RUNTIME_FUNCTION(Runtime_GetFunctionCodePositionFromSource)1363 RUNTIME_FUNCTION(Runtime_GetFunctionCodePositionFromSource) {
1364 HandleScope scope(isolate);
1365 CHECK(isolate->debug()->live_edit_enabled());
1366 DCHECK(args.length() == 2);
1367 RUNTIME_ASSERT(isolate->debug()->is_active());
1368 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
1369 CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
1370
1371 Handle<Code> code(function->code(), isolate);
1372
1373 if (code->kind() != Code::FUNCTION &&
1374 code->kind() != Code::OPTIMIZED_FUNCTION) {
1375 return isolate->heap()->undefined_value();
1376 }
1377
1378 RelocIterator it(*code, RelocInfo::ModeMask(RelocInfo::STATEMENT_POSITION));
1379 int closest_pc = 0;
1380 int distance = kMaxInt;
1381 while (!it.done()) {
1382 int statement_position = static_cast<int>(it.rinfo()->data());
1383 // Check if this break point is closer that what was previously found.
1384 if (source_position <= statement_position &&
1385 statement_position - source_position < distance) {
1386 closest_pc =
1387 static_cast<int>(it.rinfo()->pc() - code->instruction_start());
1388 distance = statement_position - source_position;
1389 // Check whether we can't get any closer.
1390 if (distance == 0) break;
1391 }
1392 it.next();
1393 }
1394
1395 return Smi::FromInt(closest_pc);
1396 }
1397
1398
1399 // Calls specified function with or without entering the debugger.
1400 // This is used in unit tests to run code as if debugger is entered or simply
1401 // to have a stack with C++ frame in the middle.
RUNTIME_FUNCTION(Runtime_ExecuteInDebugContext)1402 RUNTIME_FUNCTION(Runtime_ExecuteInDebugContext) {
1403 HandleScope scope(isolate);
1404 DCHECK(args.length() == 1);
1405 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
1406
1407 DebugScope debug_scope(isolate->debug());
1408 if (debug_scope.failed()) {
1409 DCHECK(isolate->has_pending_exception());
1410 return isolate->heap()->exception();
1411 }
1412
1413 RETURN_RESULT_OR_FAILURE(
1414 isolate, Execution::Call(isolate, function,
1415 handle(function->global_proxy()), 0, NULL));
1416 }
1417
1418
RUNTIME_FUNCTION(Runtime_GetDebugContext)1419 RUNTIME_FUNCTION(Runtime_GetDebugContext) {
1420 HandleScope scope(isolate);
1421 DCHECK(args.length() == 0);
1422 Handle<Context> context;
1423 {
1424 DebugScope debug_scope(isolate->debug());
1425 if (debug_scope.failed()) {
1426 DCHECK(isolate->has_pending_exception());
1427 return isolate->heap()->exception();
1428 }
1429 context = isolate->debug()->GetDebugContext();
1430 }
1431 if (context.is_null()) return isolate->heap()->undefined_value();
1432 context->set_security_token(isolate->native_context()->security_token());
1433 return context->global_proxy();
1434 }
1435
1436
1437 // Performs a GC.
1438 // Presently, it only does a full GC.
RUNTIME_FUNCTION(Runtime_CollectGarbage)1439 RUNTIME_FUNCTION(Runtime_CollectGarbage) {
1440 SealHandleScope shs(isolate);
1441 DCHECK(args.length() == 1);
1442 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, "%CollectGarbage");
1443 return isolate->heap()->undefined_value();
1444 }
1445
1446
1447 // Gets the current heap usage.
RUNTIME_FUNCTION(Runtime_GetHeapUsage)1448 RUNTIME_FUNCTION(Runtime_GetHeapUsage) {
1449 SealHandleScope shs(isolate);
1450 DCHECK(args.length() == 0);
1451 int usage = static_cast<int>(isolate->heap()->SizeOfObjects());
1452 if (!Smi::IsValid(usage)) {
1453 return *isolate->factory()->NewNumberFromInt(usage);
1454 }
1455 return Smi::FromInt(usage);
1456 }
1457
1458
1459 // Finds the script object from the script data. NOTE: This operation uses
1460 // heap traversal to find the function generated for the source position
1461 // for the requested break point. For lazily compiled functions several heap
1462 // traversals might be required rendering this operation as a rather slow
1463 // operation. However for setting break points which is normally done through
1464 // some kind of user interaction the performance is not crucial.
RUNTIME_FUNCTION(Runtime_GetScript)1465 RUNTIME_FUNCTION(Runtime_GetScript) {
1466 HandleScope scope(isolate);
1467 DCHECK(args.length() == 1);
1468 CONVERT_ARG_HANDLE_CHECKED(String, script_name, 0);
1469
1470 Handle<Script> found;
1471 {
1472 Script::Iterator iterator(isolate);
1473 Script* script = NULL;
1474 while ((script = iterator.Next()) != NULL) {
1475 if (!script->name()->IsString()) continue;
1476 String* name = String::cast(script->name());
1477 if (name->Equals(*script_name)) {
1478 found = Handle<Script>(script, isolate);
1479 break;
1480 }
1481 }
1482 }
1483
1484 if (found.is_null()) return isolate->heap()->undefined_value();
1485 return *Script::GetWrapper(found);
1486 }
1487
RUNTIME_FUNCTION(Runtime_ScriptLineCount)1488 RUNTIME_FUNCTION(Runtime_ScriptLineCount) {
1489 HandleScope scope(isolate);
1490 DCHECK(args.length() == 1);
1491 CONVERT_ARG_CHECKED(JSValue, script, 0);
1492
1493 RUNTIME_ASSERT(script->value()->IsScript());
1494 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1495
1496 Script::InitLineEnds(script_handle);
1497
1498 FixedArray* line_ends_array = FixedArray::cast(script_handle->line_ends());
1499 return Smi::FromInt(line_ends_array->length());
1500 }
1501
RUNTIME_FUNCTION(Runtime_ScriptLineStartPosition)1502 RUNTIME_FUNCTION(Runtime_ScriptLineStartPosition) {
1503 HandleScope scope(isolate);
1504 DCHECK(args.length() == 2);
1505 CONVERT_ARG_CHECKED(JSValue, script, 0);
1506 CONVERT_NUMBER_CHECKED(int32_t, line, Int32, args[1]);
1507
1508 RUNTIME_ASSERT(script->value()->IsScript());
1509 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1510
1511 Script::InitLineEnds(script_handle);
1512
1513 FixedArray* line_ends_array = FixedArray::cast(script_handle->line_ends());
1514 const int line_count = line_ends_array->length();
1515
1516 // If line == line_count, we return the first position beyond the last line.
1517 if (line < 0 || line > line_count) {
1518 return Smi::FromInt(-1);
1519 } else if (line == 0) {
1520 return Smi::FromInt(0);
1521 } else {
1522 DCHECK(0 < line && line <= line_count);
1523 const int pos = Smi::cast(line_ends_array->get(line - 1))->value() + 1;
1524 return Smi::FromInt(pos);
1525 }
1526 }
1527
RUNTIME_FUNCTION(Runtime_ScriptLineEndPosition)1528 RUNTIME_FUNCTION(Runtime_ScriptLineEndPosition) {
1529 HandleScope scope(isolate);
1530 DCHECK(args.length() == 2);
1531 CONVERT_ARG_CHECKED(JSValue, script, 0);
1532 CONVERT_NUMBER_CHECKED(int32_t, line, Int32, args[1]);
1533
1534 RUNTIME_ASSERT(script->value()->IsScript());
1535 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1536
1537 Script::InitLineEnds(script_handle);
1538
1539 FixedArray* line_ends_array = FixedArray::cast(script_handle->line_ends());
1540 const int line_count = line_ends_array->length();
1541
1542 if (line < 0 || line >= line_count) {
1543 return Smi::FromInt(-1);
1544 } else {
1545 return Smi::cast(line_ends_array->get(line));
1546 }
1547 }
1548
GetJSPositionInfo(Handle<Script> script,int position,Script::OffsetFlag offset_flag,Isolate * isolate)1549 static Handle<Object> GetJSPositionInfo(Handle<Script> script, int position,
1550 Script::OffsetFlag offset_flag,
1551 Isolate* isolate) {
1552 Script::PositionInfo info;
1553 if (!script->GetPositionInfo(position, &info, offset_flag)) {
1554 return handle(isolate->heap()->null_value(), isolate);
1555 }
1556
1557 Handle<String> source = handle(String::cast(script->source()), isolate);
1558 Handle<String> sourceText =
1559 isolate->factory()->NewSubString(source, info.line_start, info.line_end);
1560
1561 Handle<JSObject> jsinfo =
1562 isolate->factory()->NewJSObject(isolate->object_function());
1563
1564 JSObject::AddProperty(jsinfo, isolate->factory()->script_string(), script,
1565 NONE);
1566 JSObject::AddProperty(jsinfo, isolate->factory()->position_string(),
1567 handle(Smi::FromInt(position), isolate), NONE);
1568 JSObject::AddProperty(jsinfo, isolate->factory()->line_string(),
1569 handle(Smi::FromInt(info.line), isolate), NONE);
1570 JSObject::AddProperty(jsinfo, isolate->factory()->column_string(),
1571 handle(Smi::FromInt(info.column), isolate), NONE);
1572 JSObject::AddProperty(jsinfo, isolate->factory()->sourceText_string(),
1573 sourceText, NONE);
1574
1575 return jsinfo;
1576 }
1577
1578 // Get information on a specific source line and column possibly offset by a
1579 // fixed source position. This function is used to find a source position from
1580 // a line and column position. The fixed source position offset is typically
1581 // used to find a source position in a function based on a line and column in
1582 // the source for the function alone. The offset passed will then be the
1583 // start position of the source for the function within the full script source.
1584 // Note that incoming line and column parameters may be undefined, and are
1585 // assumed to be passed *with* offsets.
RUNTIME_FUNCTION(Runtime_ScriptLocationFromLine)1586 RUNTIME_FUNCTION(Runtime_ScriptLocationFromLine) {
1587 HandleScope scope(isolate);
1588 DCHECK(args.length() == 4);
1589 CONVERT_ARG_CHECKED(JSValue, script, 0);
1590
1591 RUNTIME_ASSERT(script->value()->IsScript());
1592 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1593
1594 // Line and column are possibly undefined and we need to handle these cases,
1595 // additionally subtracting corresponding offsets.
1596
1597 int32_t line;
1598 if (args[1]->IsNull(isolate) || args[1]->IsUndefined(isolate)) {
1599 line = 0;
1600 } else {
1601 RUNTIME_ASSERT(args[1]->IsNumber());
1602 line = NumberToInt32(args[1]) - script_handle->line_offset();
1603 }
1604
1605 int32_t column;
1606 if (args[2]->IsNull(isolate) || args[2]->IsUndefined(isolate)) {
1607 column = 0;
1608 } else {
1609 RUNTIME_ASSERT(args[2]->IsNumber());
1610 column = NumberToInt32(args[2]);
1611 if (line == 0) column -= script_handle->column_offset();
1612 }
1613
1614 CONVERT_NUMBER_CHECKED(int32_t, offset_position, Int32, args[3]);
1615
1616 if (line < 0 || column < 0 || offset_position < 0) {
1617 return isolate->heap()->null_value();
1618 }
1619
1620 Script::InitLineEnds(script_handle);
1621
1622 FixedArray* line_ends_array = FixedArray::cast(script_handle->line_ends());
1623 const int line_count = line_ends_array->length();
1624
1625 int position;
1626 if (line == 0) {
1627 position = offset_position + column;
1628 } else {
1629 Script::PositionInfo info;
1630 if (!script_handle->GetPositionInfo(offset_position, &info,
1631 Script::NO_OFFSET) ||
1632 info.line + line >= line_count) {
1633 return isolate->heap()->null_value();
1634 }
1635
1636 const int offset_line = info.line + line;
1637 const int offset_line_position =
1638 (offset_line == 0)
1639 ? 0
1640 : Smi::cast(line_ends_array->get(offset_line - 1))->value() + 1;
1641 position = offset_line_position + column;
1642 }
1643
1644 return *GetJSPositionInfo(script_handle, position, Script::NO_OFFSET,
1645 isolate);
1646 }
1647
RUNTIME_FUNCTION(Runtime_ScriptPositionInfo)1648 RUNTIME_FUNCTION(Runtime_ScriptPositionInfo) {
1649 HandleScope scope(isolate);
1650 DCHECK(args.length() == 3);
1651 CONVERT_ARG_CHECKED(JSValue, script, 0);
1652 CONVERT_NUMBER_CHECKED(int32_t, position, Int32, args[1]);
1653 CONVERT_BOOLEAN_ARG_CHECKED(with_offset, 2);
1654
1655 RUNTIME_ASSERT(script->value()->IsScript());
1656 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1657
1658 const Script::OffsetFlag offset_flag =
1659 with_offset ? Script::WITH_OFFSET : Script::NO_OFFSET;
1660 return *GetJSPositionInfo(script_handle, position, offset_flag, isolate);
1661 }
1662
1663 // Returns the given line as a string, or null if line is out of bounds.
1664 // The parameter line is expected to include the script's line offset.
RUNTIME_FUNCTION(Runtime_ScriptSourceLine)1665 RUNTIME_FUNCTION(Runtime_ScriptSourceLine) {
1666 HandleScope scope(isolate);
1667 DCHECK(args.length() == 2);
1668 CONVERT_ARG_CHECKED(JSValue, script, 0);
1669 CONVERT_NUMBER_CHECKED(int32_t, line, Int32, args[1]);
1670
1671 RUNTIME_ASSERT(script->value()->IsScript());
1672 Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
1673
1674 Script::InitLineEnds(script_handle);
1675
1676 FixedArray* line_ends_array = FixedArray::cast(script_handle->line_ends());
1677 const int line_count = line_ends_array->length();
1678
1679 line -= script_handle->line_offset();
1680 if (line < 0 || line_count <= line) {
1681 return isolate->heap()->null_value();
1682 }
1683
1684 const int start =
1685 (line == 0) ? 0 : Smi::cast(line_ends_array->get(line - 1))->value() + 1;
1686 const int end = Smi::cast(line_ends_array->get(line))->value();
1687
1688 Handle<String> source =
1689 handle(String::cast(script_handle->source()), isolate);
1690 Handle<String> str = isolate->factory()->NewSubString(source, start, end);
1691
1692 return *str;
1693 }
1694
1695 // Set one shot breakpoints for the callback function that is passed to a
1696 // built-in function such as Array.forEach to enable stepping into the callback,
1697 // if we are indeed stepping and the callback is subject to debugging.
RUNTIME_FUNCTION(Runtime_DebugPrepareStepInIfStepping)1698 RUNTIME_FUNCTION(Runtime_DebugPrepareStepInIfStepping) {
1699 HandleScope scope(isolate);
1700 DCHECK_EQ(1, args.length());
1701 CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
1702 isolate->debug()->PrepareStepIn(fun);
1703 return isolate->heap()->undefined_value();
1704 }
1705
1706 // Set one shot breakpoints for the suspended generator object.
RUNTIME_FUNCTION(Runtime_DebugPrepareStepInSuspendedGenerator)1707 RUNTIME_FUNCTION(Runtime_DebugPrepareStepInSuspendedGenerator) {
1708 HandleScope scope(isolate);
1709 DCHECK_EQ(0, args.length());
1710 isolate->debug()->PrepareStepInSuspendedGenerator();
1711 return isolate->heap()->undefined_value();
1712 }
1713
RUNTIME_FUNCTION(Runtime_DebugRecordAsyncFunction)1714 RUNTIME_FUNCTION(Runtime_DebugRecordAsyncFunction) {
1715 HandleScope scope(isolate);
1716 DCHECK_EQ(1, args.length());
1717 CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
1718 CHECK(isolate->debug()->last_step_action() >= StepNext);
1719 isolate->debug()->RecordAsyncFunction(generator);
1720 return isolate->heap()->undefined_value();
1721 }
1722
RUNTIME_FUNCTION(Runtime_DebugPushPromise)1723 RUNTIME_FUNCTION(Runtime_DebugPushPromise) {
1724 DCHECK(args.length() == 2);
1725 HandleScope scope(isolate);
1726 CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0);
1727 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 1);
1728 isolate->PushPromise(promise, function);
1729 return isolate->heap()->undefined_value();
1730 }
1731
1732
RUNTIME_FUNCTION(Runtime_DebugPopPromise)1733 RUNTIME_FUNCTION(Runtime_DebugPopPromise) {
1734 DCHECK(args.length() == 0);
1735 SealHandleScope shs(isolate);
1736 isolate->PopPromise();
1737 return isolate->heap()->undefined_value();
1738 }
1739
1740
RUNTIME_FUNCTION(Runtime_DebugAsyncTaskEvent)1741 RUNTIME_FUNCTION(Runtime_DebugAsyncTaskEvent) {
1742 DCHECK(args.length() == 1);
1743 HandleScope scope(isolate);
1744 CONVERT_ARG_HANDLE_CHECKED(JSObject, data, 0);
1745 isolate->debug()->OnAsyncTaskEvent(data);
1746 return isolate->heap()->undefined_value();
1747 }
1748
1749
RUNTIME_FUNCTION(Runtime_DebugIsActive)1750 RUNTIME_FUNCTION(Runtime_DebugIsActive) {
1751 SealHandleScope shs(isolate);
1752 return Smi::FromInt(isolate->debug()->is_active());
1753 }
1754
1755
RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode)1756 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
1757 UNIMPLEMENTED();
1758 return NULL;
1759 }
1760 } // namespace internal
1761 } // namespace v8
1762