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Issue 10878047: Revert to code state of 3.13.1 plus r12350 (Closed) Base URL: https://v8.googlecode.com/svn/trunk
Patch Set: Created 8 years, 4 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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29 29
30 #include "bootstrapper.h" 30 #include "bootstrapper.h"
31 #include "debug.h" 31 #include "debug.h"
32 #include "scopeinfo.h" 32 #include "scopeinfo.h"
33 33
34 namespace v8 { 34 namespace v8 {
35 namespace internal { 35 namespace internal {
36 36
37 Context* Context::declaration_context() { 37 Context* Context::declaration_context() {
38 Context* current = this; 38 Context* current = this;
39 while (!current->IsFunctionContext() && !current->IsNativeContext()) { 39 while (!current->IsFunctionContext() && !current->IsGlobalContext()) {
40 current = current->previous(); 40 current = current->previous();
41 ASSERT(current->closure() == closure()); 41 ASSERT(current->closure() == closure());
42 } 42 }
43 return current; 43 return current;
44 } 44 }
45 45
46 46
47 JSBuiltinsObject* Context::builtins() { 47 JSBuiltinsObject* Context::builtins() {
48 GlobalObject* object = global_object(); 48 GlobalObject* object = global();
49 if (object->IsJSGlobalObject()) { 49 if (object->IsJSGlobalObject()) {
50 return JSGlobalObject::cast(object)->builtins(); 50 return JSGlobalObject::cast(object)->builtins();
51 } else { 51 } else {
52 ASSERT(object->IsJSBuiltinsObject()); 52 ASSERT(object->IsJSBuiltinsObject());
53 return JSBuiltinsObject::cast(object); 53 return JSBuiltinsObject::cast(object);
54 } 54 }
55 } 55 }
56 56
57 57
58 Context* Context::native_context() { 58 Context* Context::global_context() {
59 // Fast case: the global object for this context has been set. In 59 // Fast case: the global object for this context has been set. In
60 // that case, the global object has a direct pointer to the global 60 // that case, the global object has a direct pointer to the global
61 // context. 61 // context.
62 if (global_object()->IsGlobalObject()) { 62 if (global()->IsGlobalObject()) {
63 return global_object()->native_context(); 63 return global()->global_context();
64 } 64 }
65 65
66 // During bootstrapping, the global object might not be set and we 66 // During bootstrapping, the global object might not be set and we
67 // have to search the context chain to find the native context. 67 // have to search the context chain to find the global context.
68 ASSERT(Isolate::Current()->bootstrapper()->IsActive()); 68 ASSERT(Isolate::Current()->bootstrapper()->IsActive());
69 Context* current = this; 69 Context* current = this;
70 while (!current->IsNativeContext()) { 70 while (!current->IsGlobalContext()) {
71 JSFunction* closure = JSFunction::cast(current->closure()); 71 JSFunction* closure = JSFunction::cast(current->closure());
72 current = Context::cast(closure->context()); 72 current = Context::cast(closure->context());
73 } 73 }
74 return current; 74 return current;
75 } 75 }
76 76
77 77
78 JSObject* Context::global_proxy() { 78 JSObject* Context::global_proxy() {
79 return native_context()->global_proxy_object(); 79 return global_context()->global_proxy_object();
80 } 80 }
81 81
82 void Context::set_global_proxy(JSObject* object) { 82 void Context::set_global_proxy(JSObject* object) {
83 native_context()->set_global_proxy_object(object); 83 global_context()->set_global_proxy_object(object);
84 } 84 }
85 85
86 86
87 Handle<Object> Context::Lookup(Handle<String> name, 87 Handle<Object> Context::Lookup(Handle<String> name,
88 ContextLookupFlags flags, 88 ContextLookupFlags flags,
89 int* index, 89 int* index,
90 PropertyAttributes* attributes, 90 PropertyAttributes* attributes,
91 BindingFlags* binding_flags) { 91 BindingFlags* binding_flags) {
92 Isolate* isolate = GetIsolate(); 92 Isolate* isolate = GetIsolate();
93 Handle<Context> context(this, isolate); 93 Handle<Context> context(this, isolate);
94 94
95 bool follow_context_chain = (flags & FOLLOW_CONTEXT_CHAIN) != 0; 95 bool follow_context_chain = (flags & FOLLOW_CONTEXT_CHAIN) != 0;
96 *index = -1; 96 *index = -1;
97 *attributes = ABSENT; 97 *attributes = ABSENT;
98 *binding_flags = MISSING_BINDING; 98 *binding_flags = MISSING_BINDING;
99 99
100 if (FLAG_trace_contexts) { 100 if (FLAG_trace_contexts) {
101 PrintF("Context::Lookup("); 101 PrintF("Context::Lookup(");
102 name->ShortPrint(); 102 name->ShortPrint();
103 PrintF(")\n"); 103 PrintF(")\n");
104 } 104 }
105 105
106 do { 106 do {
107 if (FLAG_trace_contexts) { 107 if (FLAG_trace_contexts) {
108 PrintF(" - looking in context %p", reinterpret_cast<void*>(*context)); 108 PrintF(" - looking in context %p", reinterpret_cast<void*>(*context));
109 if (context->IsNativeContext()) PrintF(" (native context)"); 109 if (context->IsGlobalContext()) PrintF(" (global context)");
110 PrintF("\n"); 110 PrintF("\n");
111 } 111 }
112 112
113 // 1. Check global objects, subjects of with, and extension objects. 113 // 1. Check global objects, subjects of with, and extension objects.
114 if (context->IsNativeContext() || 114 if (context->IsGlobalContext() ||
115 context->IsWithContext() || 115 context->IsWithContext() ||
116 (context->IsFunctionContext() && context->has_extension())) { 116 (context->IsFunctionContext() && context->has_extension())) {
117 Handle<JSObject> object(JSObject::cast(context->extension()), isolate); 117 Handle<JSObject> object(JSObject::cast(context->extension()), isolate);
118 // Context extension objects needs to behave as if they have no 118 // Context extension objects needs to behave as if they have no
119 // prototype. So even if we want to follow prototype chains, we need 119 // prototype. So even if we want to follow prototype chains, we need
120 // to only do a local lookup for context extension objects. 120 // to only do a local lookup for context extension objects.
121 if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 || 121 if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 ||
122 object->IsJSContextExtensionObject()) { 122 object->IsJSContextExtensionObject()) {
123 *attributes = object->GetLocalPropertyAttribute(*name); 123 *attributes = object->GetLocalPropertyAttribute(*name);
124 } else { 124 } else {
(...skipping 94 matching lines...) Expand 10 before | Expand all | Expand 10 after
219 PrintF("=> found in catch context\n"); 219 PrintF("=> found in catch context\n");
220 } 220 }
221 *index = Context::THROWN_OBJECT_INDEX; 221 *index = Context::THROWN_OBJECT_INDEX;
222 *attributes = NONE; 222 *attributes = NONE;
223 *binding_flags = MUTABLE_IS_INITIALIZED; 223 *binding_flags = MUTABLE_IS_INITIALIZED;
224 return context; 224 return context;
225 } 225 }
226 } 226 }
227 227
228 // 3. Prepare to continue with the previous (next outermost) context. 228 // 3. Prepare to continue with the previous (next outermost) context.
229 if (context->IsNativeContext()) { 229 if (context->IsGlobalContext()) {
230 follow_context_chain = false; 230 follow_context_chain = false;
231 } else { 231 } else {
232 context = Handle<Context>(context->previous(), isolate); 232 context = Handle<Context>(context->previous(), isolate);
233 } 233 }
234 } while (follow_context_chain); 234 } while (follow_context_chain);
235 235
236 if (FLAG_trace_contexts) { 236 if (FLAG_trace_contexts) {
237 PrintF("=> no property/slot found\n"); 237 PrintF("=> no property/slot found\n");
238 } 238 }
239 return Handle<Object>::null(); 239 return Handle<Object>::null();
240 } 240 }
241 241
242 242
243 void Context::AddOptimizedFunction(JSFunction* function) { 243 void Context::AddOptimizedFunction(JSFunction* function) {
244 ASSERT(IsNativeContext()); 244 ASSERT(IsGlobalContext());
245 #ifdef DEBUG 245 #ifdef DEBUG
246 if (FLAG_enable_slow_asserts) { 246 if (FLAG_enable_slow_asserts) {
247 Object* element = get(OPTIMIZED_FUNCTIONS_LIST); 247 Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
248 while (!element->IsUndefined()) { 248 while (!element->IsUndefined()) {
249 CHECK(element != function); 249 CHECK(element != function);
250 element = JSFunction::cast(element)->next_function_link(); 250 element = JSFunction::cast(element)->next_function_link();
251 } 251 }
252 } 252 }
253 253
254 CHECK(function->next_function_link()->IsUndefined()); 254 CHECK(function->next_function_link()->IsUndefined());
255 255
256 // Check that the context belongs to the weak native contexts list. 256 // Check that the context belongs to the weak global contexts list.
257 bool found = false; 257 bool found = false;
258 Object* context = GetHeap()->native_contexts_list(); 258 Object* context = GetHeap()->global_contexts_list();
259 while (!context->IsUndefined()) { 259 while (!context->IsUndefined()) {
260 if (context == this) { 260 if (context == this) {
261 found = true; 261 found = true;
262 break; 262 break;
263 } 263 }
264 context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK); 264 context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK);
265 } 265 }
266 CHECK(found); 266 CHECK(found);
267 #endif 267 #endif
268 function->set_next_function_link(get(OPTIMIZED_FUNCTIONS_LIST)); 268 function->set_next_function_link(get(OPTIMIZED_FUNCTIONS_LIST));
269 set(OPTIMIZED_FUNCTIONS_LIST, function); 269 set(OPTIMIZED_FUNCTIONS_LIST, function);
270 } 270 }
271 271
272 272
273 void Context::RemoveOptimizedFunction(JSFunction* function) { 273 void Context::RemoveOptimizedFunction(JSFunction* function) {
274 ASSERT(IsNativeContext()); 274 ASSERT(IsGlobalContext());
275 Object* element = get(OPTIMIZED_FUNCTIONS_LIST); 275 Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
276 JSFunction* prev = NULL; 276 JSFunction* prev = NULL;
277 while (!element->IsUndefined()) { 277 while (!element->IsUndefined()) {
278 JSFunction* element_function = JSFunction::cast(element); 278 JSFunction* element_function = JSFunction::cast(element);
279 ASSERT(element_function->next_function_link()->IsUndefined() || 279 ASSERT(element_function->next_function_link()->IsUndefined() ||
280 element_function->next_function_link()->IsJSFunction()); 280 element_function->next_function_link()->IsJSFunction());
281 if (element_function == function) { 281 if (element_function == function) {
282 if (prev == NULL) { 282 if (prev == NULL) {
283 set(OPTIMIZED_FUNCTIONS_LIST, element_function->next_function_link()); 283 set(OPTIMIZED_FUNCTIONS_LIST, element_function->next_function_link());
284 } else { 284 } else {
285 prev->set_next_function_link(element_function->next_function_link()); 285 prev->set_next_function_link(element_function->next_function_link());
286 } 286 }
287 element_function->set_next_function_link(GetHeap()->undefined_value()); 287 element_function->set_next_function_link(GetHeap()->undefined_value());
288 return; 288 return;
289 } 289 }
290 prev = element_function; 290 prev = element_function;
291 element = element_function->next_function_link(); 291 element = element_function->next_function_link();
292 } 292 }
293 UNREACHABLE(); 293 UNREACHABLE();
294 } 294 }
295 295
296 296
297 Object* Context::OptimizedFunctionsListHead() { 297 Object* Context::OptimizedFunctionsListHead() {
298 ASSERT(IsNativeContext()); 298 ASSERT(IsGlobalContext());
299 return get(OPTIMIZED_FUNCTIONS_LIST); 299 return get(OPTIMIZED_FUNCTIONS_LIST);
300 } 300 }
301 301
302 302
303 void Context::ClearOptimizedFunctions() { 303 void Context::ClearOptimizedFunctions() {
304 set(OPTIMIZED_FUNCTIONS_LIST, GetHeap()->undefined_value()); 304 set(OPTIMIZED_FUNCTIONS_LIST, GetHeap()->undefined_value());
305 } 305 }
306 306
307 307
308 #ifdef DEBUG 308 #ifdef DEBUG
309 bool Context::IsBootstrappingOrValidParentContext( 309 bool Context::IsBootstrappingOrValidParentContext(
310 Object* object, Context* child) { 310 Object* object, Context* child) {
311 // During bootstrapping we allow all objects to pass as 311 // During bootstrapping we allow all objects to pass as
312 // contexts. This is necessary to fix circular dependencies. 312 // contexts. This is necessary to fix circular dependencies.
313 if (Isolate::Current()->bootstrapper()->IsActive()) return true; 313 if (Isolate::Current()->bootstrapper()->IsActive()) return true;
314 if (!object->IsContext()) return false; 314 if (!object->IsContext()) return false;
315 Context* context = Context::cast(object); 315 Context* context = Context::cast(object);
316 return context->IsNativeContext() || context->IsModuleContext() || 316 return context->IsGlobalContext() || context->IsModuleContext() ||
317 !child->IsModuleContext(); 317 !child->IsModuleContext();
318 } 318 }
319 319
320 320
321 bool Context::IsBootstrappingOrGlobalObject(Object* object) { 321 bool Context::IsBootstrappingOrGlobalObject(Object* object) {
322 // During bootstrapping we allow all objects to pass as global 322 // During bootstrapping we allow all objects to pass as global
323 // objects. This is necessary to fix circular dependencies. 323 // objects. This is necessary to fix circular dependencies.
324 Isolate* isolate = Isolate::Current(); 324 Isolate* isolate = Isolate::Current();
325 return isolate->heap()->gc_state() != Heap::NOT_IN_GC || 325 return isolate->heap()->gc_state() != Heap::NOT_IN_GC ||
326 isolate->bootstrapper()->IsActive() || 326 isolate->bootstrapper()->IsActive() ||
327 object->IsGlobalObject(); 327 object->IsGlobalObject();
328 } 328 }
329 #endif 329 #endif
330 330
331 } } // namespace v8::internal 331 } } // namespace v8::internal
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