13ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// Copyright 2012 the V8 project authors. All rights reserved. 28a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Redistribution and use in source and binary forms, with or without 38a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// modification, are permitted provided that the following conditions are 48a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// met: 58a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// 68a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// * Redistributions of source code must retain the above copyright 78a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// notice, this list of conditions and the following disclaimer. 88a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// * Redistributions in binary form must reproduce the above 98a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// copyright notice, this list of conditions and the following 108a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// disclaimer in the documentation and/or other materials provided 118a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// with the distribution. 128a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// * Neither the name of Google Inc. nor the names of its 138a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// contributors may be used to endorse or promote products derived 148a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// from this software without specific prior written permission. 158a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// 168a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 178a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 188a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 198a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 208a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 218a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 228a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 238a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 248a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 258a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 268a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 278a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 288a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#ifndef V8_V8GLOBALS_H_ 298a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define V8_V8GLOBALS_H_ 308a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 318a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#include "globals.h" 323ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch#include "checks.h" 338a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 348a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangnamespace v8 { 358a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangnamespace internal { 368a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 378a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// This file contains constants and global declarations related to the 388a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// V8 system. 398a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 408a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Mask for the sign bit in a smi. 418a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kSmiSignMask = kIntptrSignBit; 428a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 438a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kObjectAlignmentBits = kPointerSizeLog2; 448a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kObjectAlignment = 1 << kObjectAlignmentBits; 458a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kObjectAlignmentMask = kObjectAlignment - 1; 468a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 478a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Desired alignment for pointers. 488a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kPointerAlignment = (1 << kPointerSizeLog2); 498a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kPointerAlignmentMask = kPointerAlignment - 1; 508a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 518a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Desired alignment for maps. 528a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#if V8_HOST_ARCH_64_BIT 538a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kMapAlignmentBits = kObjectAlignmentBits; 548a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#else 558a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kMapAlignmentBits = kObjectAlignmentBits + 3; 568a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#endif 578a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kMapAlignment = (1 << kMapAlignmentBits); 588a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kMapAlignmentMask = kMapAlignment - 1; 598a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 608a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Desired alignment for generated code is 32 bytes (to improve cache line 618a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// utilization). 628a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kCodeAlignmentBits = 5; 638a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kCodeAlignment = 1 << kCodeAlignmentBits; 648a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kCodeAlignmentMask = kCodeAlignment - 1; 658a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 668a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Tag information for Failure. 678a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kFailureTag = 3; 688a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kFailureTagSize = 2; 698a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1; 708a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 718a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 728a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Zap-value: The value used for zapping dead objects. 731e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block// Should be a recognizable hex value tagged as a failure. 748a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#ifdef V8_HOST_ARCH_64_BIT 758a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst Address kZapValue = 761e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block reinterpret_cast<Address>(V8_UINT64_C(0xdeadbeedbeadbeef)); 778a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst Address kHandleZapValue = 781e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block reinterpret_cast<Address>(V8_UINT64_C(0x1baddead0baddeaf)); 798a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst Address kFromSpaceZapValue = 801e0659c275bb392c045087af4f6b0d7565cb3d77Steve Block reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdaf)); 81b8e0da25ee8efac3bb05cd6b2730aafbd96119f4Ben Murdochconst uint64_t kDebugZapValue = V8_UINT64_C(0xbadbaddbbadbaddb); 821e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockconst uint64_t kSlotsZapValue = V8_UINT64_C(0xbeefdeadbeefdeef); 833ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst uint64_t kFreeListZapValue = 0xfeed1eaffeed1eaf; 848a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#else 851e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockconst Address kZapValue = reinterpret_cast<Address>(0xdeadbeef); 861e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockconst Address kHandleZapValue = reinterpret_cast<Address>(0xbaddeaf); 871e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockconst Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdaf); 881e0659c275bb392c045087af4f6b0d7565cb3d77Steve Blockconst uint32_t kSlotsZapValue = 0xbeefdeef; 898a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst uint32_t kDebugZapValue = 0xbadbaddb; 903ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst uint32_t kFreeListZapValue = 0xfeed1eaf; 918a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#endif 928a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 938a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 943ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// Number of bits to represent the page size for paged spaces. The value of 20 953ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// gives 1Mb bytes per page. 963ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst int kPageSizeBits = 20; 978a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 988a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// On Intel architecture, cache line size is 64 bytes. 998a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// On ARM it may be less (32 bytes), but as far this constant is 1008a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// used for aligning data, it doesn't hurt to align on a greater value. 1018a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kProcessorCacheLineSize = 64; 1028a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1038a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Constants relevant to double precision floating point numbers. 1048a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// If looking only at the top 32 bits, the QNaN mask is bits 19 to 30. 1058a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst uint32_t kQuietNaNHighBitsMask = 0xfff << (51 - 32); 1068a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1078a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1088a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// ----------------------------------------------------------------------------- 1098a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Forward declarations for frequently used classes 1108a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1118a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass AccessorInfo; 1128a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Allocation; 1138a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Arguments; 1148a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Assembler; 1158a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass AssertNoAllocation; 1168a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Code; 1178a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass CodeGenerator; 1188a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass CodeStub; 1198a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Context; 1208a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Debug; 1218a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Debugger; 1228a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass DebugInfo; 1238a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Descriptor; 1248a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass DescriptorArray; 1258a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass ExternalReference; 1268a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass FixedArray; 1278a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass FunctionTemplateInfo; 1283ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochclass MemoryChunk; 129c7cc028aaeedbbfa11c11d0b7b243b3d9e837ed9Ben Murdochclass SeededNumberDictionary; 130c7cc028aaeedbbfa11c11d0b7b243b3d9e837ed9Ben Murdochclass UnseededNumberDictionary; 1318a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass StringDictionary; 1328a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtemplate <typename T> class Handle; 1338a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Heap; 1348a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass HeapObject; 1358a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass IC; 1368a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass InterceptorInfo; 1378a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass JSArray; 1388a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass JSFunction; 1398a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass JSObject; 1408a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass LargeObjectSpace; 1418a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass LookupResult; 1428a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass MacroAssembler; 1438a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Map; 1448a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass MapSpace; 1458a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass MarkCompactCollector; 1468a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass NewSpace; 1478a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Object; 1488a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass MaybeObject; 1498a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass OldSpace; 150257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochclass Foreign; 1518a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Scope; 1523ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochclass ScopeInfo; 1538a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Script; 1548a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Smi; 1558a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtemplate <typename Config, class Allocator = FreeStoreAllocationPolicy> 1568a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang class SplayTree; 1578a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass String; 1588a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Struct; 1598a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Variable; 1608a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass RelocInfo; 1618a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Deserializer; 1628a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass MessageLocation; 1638a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass ObjectGroup; 1648a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass TickSample; 1658a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass VirtualMemory; 1668a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangclass Mutex; 1678a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1688a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtypedef bool (*WeakSlotCallback)(Object** pointer); 1698a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 170257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochtypedef bool (*WeakSlotCallbackWithHeap)(Heap* heap, Object** pointer); 171257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 1728a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// ----------------------------------------------------------------------------- 1738a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Miscellaneous 1748a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1758a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// NOTE: SpaceIterator depends on AllocationSpace enumeration values being 1768a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// consecutive. 1778a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum AllocationSpace { 1788a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang NEW_SPACE, // Semispaces collected with copying collector. 1798a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang OLD_POINTER_SPACE, // May contain pointers to new space. 1808a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang OLD_DATA_SPACE, // Must not have pointers to new space. 1818a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang CODE_SPACE, // No pointers to new space, marked executable. 1828a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MAP_SPACE, // Only and all map objects. 1838a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang CELL_SPACE, // Only and all cell objects. 1848a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang LO_SPACE, // Promoted large objects. 1858a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1868a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang FIRST_SPACE = NEW_SPACE, 1878a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang LAST_SPACE = LO_SPACE, 1888a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang FIRST_PAGED_SPACE = OLD_POINTER_SPACE, 1898a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang LAST_PAGED_SPACE = CELL_SPACE 1908a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 1918a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kSpaceTagSize = 3; 1928a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangconst int kSpaceTagMask = (1 << kSpaceTagSize) - 1; 1938a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1948a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 1958a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// A flag that indicates whether objects should be pretenured when 1968a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// allocated (allocated directly into the old generation) or not 1978a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// (allocated in the young generation if the object size and type 1988a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// allows). 1998a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum PretenureFlag { NOT_TENURED, TENURED }; 2008a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2018a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum GarbageCollector { SCAVENGER, MARK_COMPACTOR }; 2028a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2038a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum Executability { NOT_EXECUTABLE, EXECUTABLE }; 2048a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 205257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochenum VisitMode { 206257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch VISIT_ALL, 207257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch VISIT_ALL_IN_SCAVENGE, 208257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch VISIT_ALL_IN_SWEEP_NEWSPACE, 209257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch VISIT_ONLY_STRONG 210257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch}; 2118a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2128a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Flag indicating whether code is built into the VM (one of the natives files). 2138a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum NativesFlag { NOT_NATIVES_CODE, NATIVES_CODE }; 2148a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2158a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2168a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// A CodeDesc describes a buffer holding instructions and relocation 2178a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// information. The instructions start at the beginning of the buffer 2188a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// and grow forward, the relocation information starts at the end of 2198a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// the buffer and grows backward. 2208a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// 2218a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// |<--------------- buffer_size ---------------->| 2228a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// |<-- instr_size -->| |<-- reloc_size -->| 2238a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// +==================+========+==================+ 2248a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// | instructions | free | reloc info | 2258a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// +==================+========+==================+ 2268a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// ^ 2278a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// | 2288a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// buffer 2298a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2308a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangstruct CodeDesc { 2318a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang byte* buffer; 2328a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang int buffer_size; 2338a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang int instr_size; 2348a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang int reloc_size; 2358a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang Assembler* origin; 2368a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 2378a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2388a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2398a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Callback function used for iterating objects in heap spaces, 2408a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// for example, scanning heap objects. 2418a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtypedef int (*HeapObjectCallback)(HeapObject* obj); 2428a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2438a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2448a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Callback function used for checking constraints when copying/relocating 2458a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// objects. Returns true if an object can be copied/relocated from its 2468a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// old_addr to a new_addr. 2478a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtypedef bool (*ConstraintCallback)(Address new_addr, Address old_addr); 2488a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2498a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2508a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Callback function on inline caches, used for iterating over inline caches 2518a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// in compiled code. 2528a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangtypedef void (*InlineCacheCallback)(Code* code, Address ic); 2538a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2548a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2558a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// State for inline cache call sites. Aliased as IC::State. 2568a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum InlineCacheState { 2578a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Has never been executed. 2588a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang UNINITIALIZED, 2598a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Has been executed but monomorhic state has been delayed. 2608a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang PREMONOMORPHIC, 2618a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Has been executed and only one receiver type has been seen. 2628a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MONOMORPHIC, 2638a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Like MONOMORPHIC but check failed due to prototype. 2648a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MONOMORPHIC_PROTOTYPE_FAILURE, 2658a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Multiple receiver types have been seen. 2668a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MEGAMORPHIC, 2678a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Special states for debug break or step in prepare stubs. 2688a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang DEBUG_BREAK, 2698a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang DEBUG_PREPARE_STEP_IN 2708a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 2718a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2728a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 273b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdochenum CheckType { 274b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch RECEIVER_MAP_CHECK, 275b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch STRING_CHECK, 276b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch NUMBER_CHECK, 277b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch BOOLEAN_CHECK 278b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch}; 279b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 280b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 2818a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum CallFunctionFlags { 2828a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang NO_CALL_FUNCTION_FLAGS = 0, 283257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch // Receiver might implicitly be the global objects. If it is, the 284257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch // hole is passed to the call function stub. 2853ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch RECEIVER_MIGHT_BE_IMPLICIT = 1 << 0, 2863ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // The call target is cached in the instruction stream. 2873ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch RECORD_CALL_TARGET = 1 << 1 2888a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 2898a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2908a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2918a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum InlineCacheHolderFlag { 2928a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang OWN_MAP, // For fast properties objects. 2938a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang PROTOTYPE_MAP // For slow properties objects (except GlobalObjects). 2948a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 2958a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2968a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 2973ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// The Store Buffer (GC). 2983ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochtypedef enum { 2993ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch kStoreBufferFullEvent, 3003ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch kStoreBufferStartScanningPagesEvent, 3013ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch kStoreBufferScanningPageEvent 3023ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch} StoreBufferEvent; 3033ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 3043ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 3053ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochtypedef void (*StoreBufferCallback)(Heap* heap, 3063ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch MemoryChunk* page, 3073ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch StoreBufferEvent event); 3088a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3098a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3108a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Whether to remove map transitions and constant transitions from a 3118a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// DescriptorArray. 3128a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum TransitionFlag { 3138a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang REMOVE_TRANSITIONS, 3148a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang KEEP_TRANSITIONS 3158a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3168a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3178a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3188a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Union used for fast testing of specific double values. 3198a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangunion DoubleRepresentation { 3208a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang double value; 3218a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang int64_t bits; 3228a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang DoubleRepresentation(double x) { value = x; } 3238a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3248a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3258a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3268a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Union used for customized checking of the IEEE double types 3278a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// inlined within v8 runtime, rather than going to the underlying 3288a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// platform headers and libraries 3298a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangunion IeeeDoubleLittleEndianArchType { 3308a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang double d; 3318a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang struct { 3328a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int man_low :32; 3338a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int man_high :20; 3348a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int exp :11; 3358a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int sign :1; 3368a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang } bits; 3378a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3388a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3398a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3408a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangunion IeeeDoubleBigEndianArchType { 3418a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang double d; 3428a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang struct { 3438a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int sign :1; 3448a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int exp :11; 3458a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int man_high :20; 3468a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang unsigned int man_low :32; 3478a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang } bits; 3488a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3498a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3508a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3518a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// AccessorCallback 3528a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangstruct AccessorDescriptor { 3538a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MaybeObject* (*getter)(Object* object, void* data); 3548a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang MaybeObject* (*setter)(JSObject* object, Object* value, void* data); 3558a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang void* data; 3568a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3578a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3588a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3593fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch// Logging and profiling. A StateTag represents a possible state of 3603fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch// the VM. The logger maintains a stack of these. Creating a VMState 3613fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch// object enters a state by pushing on the stack, and destroying a 3623fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch// VMState object leaves a state by popping the current state from the 3633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch// stack. 3648a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3658a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define STATE_TAG_LIST(V) \ 3668a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang V(JS) \ 3678a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang V(GC) \ 3688a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang V(COMPILER) \ 3698a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang V(OTHER) \ 3708a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang V(EXTERNAL) 3718a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3728a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum StateTag { 3738a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define DEF_STATE_TAG(name) name, 3748a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang STATE_TAG_LIST(DEF_STATE_TAG) 3758a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#undef DEF_STATE_TAG 3768a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang // Pseudo-types. 3778a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang state_tag_count 3788a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang}; 3798a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3808a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3818a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// ----------------------------------------------------------------------------- 3828a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Macros 3838a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3848a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Testers for test. 3858a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3868a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define HAS_SMI_TAG(value) \ 3878a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang ((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag) 3888a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3898a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define HAS_FAILURE_TAG(value) \ 3908a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang ((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag) 3918a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3928a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer 3938a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define OBJECT_POINTER_ALIGN(value) \ 3948a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang (((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask) 3958a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 3968a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// POINTER_SIZE_ALIGN returns the value aligned as a pointer. 3978a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define POINTER_SIZE_ALIGN(value) \ 3988a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang (((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask) 3998a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 4008a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// MAP_POINTER_ALIGN returns the value aligned as a map pointer. 4018a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define MAP_POINTER_ALIGN(value) \ 4028a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang (((value) + kMapAlignmentMask) & ~kMapAlignmentMask) 4038a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 4048a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// CODE_POINTER_ALIGN returns the value aligned as a generated code segment. 4058a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define CODE_POINTER_ALIGN(value) \ 4068a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang (((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask) 4078a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 4088a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Support for tracking C++ memory allocation. Insert TRACK_MEMORY("Fisk") 4098a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// inside a C++ class and new and delete will be overloaded so logging is 4108a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// performed. 4118a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// This file (globals.h) is included before log.h, so we use direct calls to 4128a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// the Logger rather than the LOG macro. 4138a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#ifdef DEBUG 4148a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define TRACK_MEMORY(name) \ 4158a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang void* operator new(size_t size) { \ 4168a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang void* result = ::operator new(size); \ 41744f0eee88ff00398ff7f715fab053374d808c90dSteve Block Logger::NewEventStatic(name, result, size); \ 4188a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang return result; \ 4198a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang } \ 4208a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang void operator delete(void* object) { \ 42144f0eee88ff00398ff7f715fab053374d808c90dSteve Block Logger::DeleteEventStatic(name, object); \ 4228a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang ::operator delete(object); \ 4238a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang } 4248a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#else 4258a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#define TRACK_MEMORY(name) 4268a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#endif 4278a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 4288a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 4298a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// Feature flags bit positions. They are mostly based on the CPUID spec. 4308a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// (We assign CPUID itself to one of the currently reserved bits -- 4318a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// feel free to change this if needed.) 4328a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang// On X86/X64, values below 32 are bits in EDX, values above 32 are bits in ECX. 4338a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wangenum CpuFeature { SSE4_1 = 32 + 19, // x86 4348a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang SSE3 = 32 + 0, // x86 4358a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang SSE2 = 26, // x86 4368a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang CMOV = 15, // x86 4378a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang RDTSC = 4, // x86 4388a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang CPUID = 10, // x86 4398a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang VFP3 = 1, // ARM 4408a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang ARMv7 = 2, // ARM 44144f0eee88ff00398ff7f715fab053374d808c90dSteve Block SAHF = 0, // x86 44244f0eee88ff00398ff7f715fab053374d808c90dSteve Block FPU = 1}; // MIPS 4438a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 444257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 445257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch// Used to specify if a macro instruction must perform a smi check on tagged 446257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch// values. 447257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochenum SmiCheckType { 4483ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch DONT_DO_SMI_CHECK, 449257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch DO_SMI_CHECK 450257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch}; 451257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 452257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 453257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch// Used to specify whether a receiver is implicitly or explicitly 454257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch// provided to a call. 455257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochenum CallKind { 4563ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CALL_AS_METHOD, 457257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch CALL_AS_FUNCTION 458257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch}; 459257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 4603fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4613ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochenum ScopeType { 4623ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch EVAL_SCOPE, // The top-level scope for an eval source. 4633ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch FUNCTION_SCOPE, // The top-level scope for a function. 4643ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch MODULE_SCOPE, // The scope introduced by a module literal 4653ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch GLOBAL_SCOPE, // The top-level scope for a program or a top-level eval. 4663ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CATCH_SCOPE, // The scope introduced by catch. 4673ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch BLOCK_SCOPE, // The scope introduced by a new block. 4683ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch WITH_SCOPE // The scope introduced by with. 4693ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch}; 4703ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4713ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4723ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst uint32_t kHoleNanUpper32 = 0x7FFFFFFF; 4733ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst uint32_t kHoleNanLower32 = 0xFFFFFFFF; 4743ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochconst uint32_t kNaNOrInfinityLowerBoundUpper32 = 0x7FF00000; 4753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4763fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochconst uint64_t kHoleNanInt64 = 4773fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch (static_cast<uint64_t>(kHoleNanUpper32) << 32) | kHoleNanLower32; 4783fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochconst uint64_t kLastNonNaNInt64 = 4793fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch (static_cast<uint64_t>(kNaNOrInfinityLowerBoundUpper32) << 32); 4803fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4813ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4823ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochenum VariableMode { 4833ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // User declared variables: 4843ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch VAR, // declared via 'var', and 'function' declarations 4853ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4863ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CONST, // declared via 'const' declarations 4873ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4883ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CONST_HARMONY, // declared via 'const' declarations in harmony mode 4893ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4903ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch LET, // declared via 'let' declarations 4913ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4923ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Variables introduced by the compiler: 4933ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch DYNAMIC, // always require dynamic lookup (we don't know 4943ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // the declaration) 4953ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 4963ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch DYNAMIC_GLOBAL, // requires dynamic lookup, but we know that the 4973ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // variable is global unless it has been shadowed 4983ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // by an eval-introduced variable 4993ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5003ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch DYNAMIC_LOCAL, // requires dynamic lookup, but we know that the 5013ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // variable is local and where it is unless it 5023ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // has been shadowed by an eval-introduced 5033ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // variable 5043ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5053ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch INTERNAL, // like VAR, but not user-visible (may or may not 5063ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // be in a context) 5073ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5083ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch TEMPORARY // temporary variables (not user-visible), never 5093ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // in a context 5103ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch}; 5113ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5123ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5133ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// ES6 Draft Rev3 10.2 specifies declarative environment records with mutable 5143ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// and immutable bindings that can be in two states: initialized and 5153ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// uninitialized. In ES5 only immutable bindings have these two states. When 5163ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// accessing a binding, it needs to be checked for initialization. However in 5173ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// the following cases the binding is initialized immediately after creation 5183ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// so the initialization check can always be skipped: 5193ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 1. Var declared local variables. 5203ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// var foo; 5213ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 2. A local variable introduced by a function declaration. 5223ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// function foo() {} 5233ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 3. Parameters 5243ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// function x(foo) {} 5253ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 4. Catch bound variables. 5263ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// try {} catch (foo) {} 5273ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 6. Function variables of named function expressions. 5283ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// var x = function foo() {} 5293ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 7. Implicit binding of 'this'. 5303ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 8. Implicit binding of 'arguments' in functions. 5313ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 5323ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// ES5 specified object environment records which are introduced by ES elements 5333ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// such as Program and WithStatement that associate identifier bindings with the 5343ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// properties of some object. In the specification only mutable bindings exist 5353ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// (which may be non-writable) and have no distinct initialization step. However 5363ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// V8 allows const declarations in global code with distinct creation and 5373ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// initialization steps which are represented by non-writable properties in the 5383ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// global object. As a result also these bindings need to be checked for 5393ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// initialization. 5403ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// 5413ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// The following enum specifies a flag that indicates if the binding needs a 5423ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// distinct initialization step (kNeedsInitialization) or if the binding is 5433ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// immediately initialized upon creation (kCreatedInitialized). 5443ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochenum InitializationFlag { 5453ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch kNeedsInitialization, 5463ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch kCreatedInitialized 5473ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch}; 5483ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5493ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5503ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdochenum ClearExceptionFlag { 5513ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch KEEP_EXCEPTION, 5523ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch CLEAR_EXCEPTION 5533ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch}; 5543ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5553ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 5568a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang} } // namespace v8::internal 5578a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang 5588a31eba00023874d4a1dcdc5f411cc4336776874Shimeng (Simon) Wang#endif // V8_V8GLOBALS_H_ 559