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Issue 1180043004: Revert of Add script context with context-allocated "const this" (Closed) Base URL: https://chromium.googlesource.com/v8/v8@master
Patch Set: Created 5 years, 6 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // The common functionality when building with or without snapshots. 5 // The common functionality when building with or without snapshots.
6 6
7 #include "src/v8.h" 7 #include "src/v8.h"
8 8
9 #include "src/api.h" 9 #include "src/api.h"
10 #include "src/base/platform/platform.h" 10 #include "src/base/platform/platform.h"
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70 Vector<const byte> context_data = ExtractContextData(blob); 70 Vector<const byte> context_data = ExtractContextData(blob);
71 SnapshotData snapshot_data(context_data); 71 SnapshotData snapshot_data(context_data);
72 Deserializer deserializer(&snapshot_data); 72 Deserializer deserializer(&snapshot_data);
73 73
74 MaybeHandle<Object> maybe_context = deserializer.DeserializePartial( 74 MaybeHandle<Object> maybe_context = deserializer.DeserializePartial(
75 isolate, global_proxy, outdated_contexts_out); 75 isolate, global_proxy, outdated_contexts_out);
76 Handle<Object> result; 76 Handle<Object> result;
77 if (!maybe_context.ToHandle(&result)) return MaybeHandle<Context>(); 77 if (!maybe_context.ToHandle(&result)) return MaybeHandle<Context>();
78 CHECK(result->IsContext()); 78 CHECK(result->IsContext());
79 // If the snapshot does not contain a custom script, we need to update 79 // If the snapshot does not contain a custom script, we need to update
80 // the global object for exactly two contexts: the builtins context and the 80 // the global object for exactly one context.
81 // script context that has the global "this" binding. 81 CHECK(EmbedsScript(isolate) || (*outdated_contexts_out)->length() == 1);
82 CHECK(EmbedsScript(isolate) || (*outdated_contexts_out)->length() == 2);
83 if (FLAG_profile_deserialization) { 82 if (FLAG_profile_deserialization) {
84 double ms = timer.Elapsed().InMillisecondsF(); 83 double ms = timer.Elapsed().InMillisecondsF();
85 int bytes = context_data.length(); 84 int bytes = context_data.length();
86 PrintF("[Deserializing context (%d bytes) took %0.3f ms]\n", bytes, ms); 85 PrintF("[Deserializing context (%d bytes) took %0.3f ms]\n", bytes, ms);
87 } 86 }
88 return Handle<Context>::cast(result); 87 return Handle<Context>::cast(result);
89 } 88 }
90 89
91 90
92 void CalculateFirstPageSizes(bool is_default_snapshot, 91 void CalculateFirstPageSizes(bool is_default_snapshot,
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222 memcpy(&startup_length, data->data + kStartupLengthOffset, kIntSize); 221 memcpy(&startup_length, data->data + kStartupLengthOffset, kIntSize);
223 int context_offset = ContextOffset(startup_length); 222 int context_offset = ContextOffset(startup_length);
224 const byte* context_data = 223 const byte* context_data =
225 reinterpret_cast<const byte*>(data->data + context_offset); 224 reinterpret_cast<const byte*>(data->data + context_offset);
226 DCHECK_LT(context_offset, data->raw_size); 225 DCHECK_LT(context_offset, data->raw_size);
227 int context_length = data->raw_size - context_offset; 226 int context_length = data->raw_size - context_offset;
228 return Vector<const byte>(context_data, context_length); 227 return Vector<const byte>(context_data, context_length);
229 } 228 }
230 } // namespace internal 229 } // namespace internal
231 } // namespace v8 230 } // namespace v8
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