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Side by Side Diff: src/globals.h

Issue 898983002: Add strong mode. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 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 #ifndef V8_GLOBALS_H_ 5 #ifndef V8_GLOBALS_H_
6 #define V8_GLOBALS_H_ 6 #define V8_GLOBALS_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
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220 class FreeStoreAllocationPolicy; 220 class FreeStoreAllocationPolicy;
221 template <typename T, class P = FreeStoreAllocationPolicy> class List; 221 template <typename T, class P = FreeStoreAllocationPolicy> class List;
222 222
223 // ----------------------------------------------------------------------------- 223 // -----------------------------------------------------------------------------
224 // Declarations for use in both the preparser and the rest of V8. 224 // Declarations for use in both the preparser and the rest of V8.
225 225
226 // The Strict Mode (ECMA-262 5th edition, 4.2.2). 226 // The Strict Mode (ECMA-262 5th edition, 4.2.2).
227 227
228 enum LanguageMode { 228 enum LanguageMode {
229 // LanguageMode is expressed as a bitmask. Descriptions of the bits: 229 // LanguageMode is expressed as a bitmask. Descriptions of the bits:
230 STRICT = 1 << 0, 230 STRICT_BIT = 1 << 0,
231 SANE_BIT = 1 << 1,
231 LANGUAGE_END, 232 LANGUAGE_END,
232 233
233 // Shorthands for some common language modes. 234 // Shorthands for some common language modes.
234 SLOPPY = 0 235 SLOPPY = 0,
236 STRICT = STRICT_BIT,
237 SANE = STRICT_BIT | SANE_BIT
235 }; 238 };
236 239
237 inline bool is_strict(LanguageMode language_mode) { 240 inline bool is_strict(LanguageMode language_mode) {
238 return language_mode & STRICT; 241 return language_mode & STRICT_BIT;
239 } 242 }
240 243
244
241 inline bool is_sloppy(LanguageMode language_mode) { 245 inline bool is_sloppy(LanguageMode language_mode) {
rossberg 2015/02/04 16:18:08 Nit: perhaps reorder methods.
marja 2015/02/05 12:11:37 Done.
242 return (language_mode & STRICT) == 0; 246 return (language_mode & STRICT_BIT) == 0;
243 } 247 }
244 248
249
250 inline bool is_sane(LanguageMode language_mode) {
251 return language_mode & SANE_BIT;
252 }
253
254
245 inline bool is_valid_language_mode(int language_mode) { 255 inline bool is_valid_language_mode(int language_mode) {
246 return language_mode == SLOPPY || language_mode == STRICT; 256 return language_mode == SLOPPY || language_mode == STRICT ||
257 language_mode == SANE;
247 } 258 }
248 259
260
261 inline LanguageMode construct_language_mode(bool strict_bit, bool sane_bit) {
262 int language_mode = 0;
263 if (strict_bit) language_mode |= STRICT_BIT;
264 if (sane_bit) language_mode |= SANE_BIT;
265 DCHECK(is_valid_language_mode(language_mode));
266 return static_cast<LanguageMode>(language_mode);
267 }
268
269
249 // Mask for the sign bit in a smi. 270 // Mask for the sign bit in a smi.
250 const intptr_t kSmiSignMask = kIntptrSignBit; 271 const intptr_t kSmiSignMask = kIntptrSignBit;
251 272
252 const int kObjectAlignmentBits = kPointerSizeLog2; 273 const int kObjectAlignmentBits = kPointerSizeLog2;
253 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits; 274 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits;
254 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1; 275 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
255 276
256 // Desired alignment for pointers. 277 // Desired alignment for pointers.
257 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2); 278 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2);
258 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1; 279 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
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837 858
838 inline bool IsSubclassConstructor(FunctionKind kind) { 859 inline bool IsSubclassConstructor(FunctionKind kind) {
839 DCHECK(IsValidFunctionKind(kind)); 860 DCHECK(IsValidFunctionKind(kind));
840 return kind & FunctionKind::kSubclassConstructor; 861 return kind & FunctionKind::kSubclassConstructor;
841 } 862 }
842 } } // namespace v8::internal 863 } } // namespace v8::internal
843 864
844 namespace i = v8::internal; 865 namespace i = v8::internal;
845 866
846 #endif // V8_GLOBALS_H_ 867 #endif // V8_GLOBALS_H_
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